diff --git a/models/git/protected_branch.go b/models/git/protected_branch.go
index 5ed1003749..5be35f4b11 100644
--- a/models/git/protected_branch.go
+++ b/models/git/protected_branch.go
@@ -315,6 +315,11 @@ type WhitelistOptions struct {
 // This function also performs check if whitelist user and team's IDs have been changed
 // to avoid unnecessary whitelist delete and regenerate.
 func UpdateProtectBranch(ctx context.Context, repo *repo_model.Repository, protectBranch *ProtectedBranch, opts WhitelistOptions) (err error) {
+	err = repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	if err = repo.LoadOwner(ctx); err != nil {
 		return fmt.Errorf("LoadOwner: %v", err)
 	}
@@ -445,9 +450,14 @@ func updateTeamWhitelist(ctx context.Context, repo *repo_model.Repository, curre
 }
 
 // DeleteProtectedBranch removes ProtectedBranch relation between the user and repository.
-func DeleteProtectedBranch(ctx context.Context, repoID, id int64) (err error) {
+func DeleteProtectedBranch(ctx context.Context, repo *repo_model.Repository, id int64) (err error) {
+	err = repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	protectedBranch := &ProtectedBranch{
-		RepoID: repoID,
+		RepoID: repo.ID,
 		ID:     id,
 	}
 
diff --git a/models/repo/repo.go b/models/repo/repo.go
index 5ebc7bfc24..0b0c029993 100644
--- a/models/repo/repo.go
+++ b/models/repo/repo.go
@@ -47,6 +47,14 @@ func (err ErrUserDoesNotHaveAccessToRepo) Unwrap() error {
 	return util.ErrPermissionDenied
 }
 
+type ErrRepoIsArchived struct {
+	Repo *Repository
+}
+
+func (err ErrRepoIsArchived) Error() string {
+	return fmt.Sprintf("%s is archived", err.Repo.LogString())
+}
+
 var (
 	reservedRepoNames    = []string{".", "..", "-"}
 	reservedRepoPatterns = []string{"*.git", "*.wiki", "*.rss", "*.atom"}
@@ -654,6 +662,14 @@ func (repo *Repository) GetTrustModel() TrustModelType {
 	return trustModel
 }
 
+// MustNotBeArchived returns ErrRepoIsArchived if the repo is archived
+func (repo *Repository) MustNotBeArchived() error {
+	if repo.IsArchived {
+		return ErrRepoIsArchived{Repo: repo}
+	}
+	return nil
+}
+
 // __________                           .__  __
 // \______   \ ____ ______   ____  _____|__|/  |_  ___________ ___.__.
 //  |       _// __ \\____ \ /  _ \/  ___/  \   __\/  _ \_  __ <   |  |
diff --git a/modules/context/api.go b/modules/context/api.go
index 044ec51b56..a46af6ed78 100644
--- a/modules/context/api.go
+++ b/modules/context/api.go
@@ -101,6 +101,12 @@ type APIRedirect struct{}
 // swagger:response string
 type APIString string
 
+// APIRepoArchivedError is an error that is raised when an archived repo should be modified
+// swagger:response repoArchivedError
+type APIRepoArchivedError struct {
+	APIError
+}
+
 // ServerError responds with error message, status is 500
 func (ctx *APIContext) ServerError(title string, err error) {
 	ctx.Error(http.StatusInternalServerError, title, err)
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 763d56ecd2..dc1f914922 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -675,7 +675,7 @@ func mustEnableWiki(ctx *context.APIContext) {
 
 func mustNotBeArchived(ctx *context.APIContext) {
 	if ctx.Repo.Repository.IsArchived {
-		ctx.NotFound()
+		ctx.Error(http.StatusLocked, "RepoArchived", fmt.Errorf("%s is archived", ctx.Repo.Repository.LogString()))
 		return
 	}
 }
@@ -1108,23 +1108,23 @@ func Routes() *web.Route {
 				m.Group("/branches", func() {
 					m.Get("", repo.ListBranches)
 					m.Get("/*", repo.GetBranch)
-					m.Delete("/*", reqToken(), reqRepoWriter(unit.TypeCode), repo.DeleteBranch)
-					m.Post("", reqToken(), reqRepoWriter(unit.TypeCode), bind(api.CreateBranchRepoOption{}), repo.CreateBranch)
+					m.Delete("/*", reqToken(), reqRepoWriter(unit.TypeCode), mustNotBeArchived, repo.DeleteBranch)
+					m.Post("", reqToken(), reqRepoWriter(unit.TypeCode), mustNotBeArchived, bind(api.CreateBranchRepoOption{}), repo.CreateBranch)
 				}, context.ReferencesGitRepo(), reqRepoReader(unit.TypeCode))
 				m.Group("/branch_protections", func() {
 					m.Get("", repo.ListBranchProtections)
-					m.Post("", bind(api.CreateBranchProtectionOption{}), repo.CreateBranchProtection)
+					m.Post("", bind(api.CreateBranchProtectionOption{}), mustNotBeArchived, repo.CreateBranchProtection)
 					m.Group("/{name}", func() {
 						m.Get("", repo.GetBranchProtection)
-						m.Patch("", bind(api.EditBranchProtectionOption{}), repo.EditBranchProtection)
+						m.Patch("", bind(api.EditBranchProtectionOption{}), mustNotBeArchived, repo.EditBranchProtection)
 						m.Delete("", repo.DeleteBranchProtection)
 					})
 				}, reqToken(), reqAdmin())
 				m.Group("/tags", func() {
 					m.Get("", repo.ListTags)
 					m.Get("/*", repo.GetTag)
-					m.Post("", reqToken(), reqRepoWriter(unit.TypeCode), bind(api.CreateTagOption{}), repo.CreateTag)
-					m.Delete("/*", reqToken(), repo.DeleteTag)
+					m.Post("", reqToken(), reqRepoWriter(unit.TypeCode), mustNotBeArchived, bind(api.CreateTagOption{}), repo.CreateTag)
+					m.Delete("/*", reqToken(), reqRepoWriter(unit.TypeCode), mustNotBeArchived, repo.DeleteTag)
 				}, reqRepoReader(unit.TypeCode), context.ReferencesGitRepo(true))
 				m.Group("/keys", func() {
 					m.Combo("").Get(repo.ListDeployKeys).
@@ -1245,15 +1245,15 @@ func Routes() *web.Route {
 					m.Get("/tags/{sha}", repo.GetAnnotatedTag)
 					m.Get("/notes/{sha}", repo.GetNote)
 				}, context.ReferencesGitRepo(true), reqRepoReader(unit.TypeCode))
-				m.Post("/diffpatch", reqRepoWriter(unit.TypeCode), reqToken(), bind(api.ApplyDiffPatchFileOptions{}), repo.ApplyDiffPatch)
+				m.Post("/diffpatch", reqRepoWriter(unit.TypeCode), reqToken(), bind(api.ApplyDiffPatchFileOptions{}), mustNotBeArchived, repo.ApplyDiffPatch)
 				m.Group("/contents", func() {
 					m.Get("", repo.GetContentsList)
-					m.Post("", reqToken(), bind(api.ChangeFilesOptions{}), reqRepoBranchWriter, repo.ChangeFiles)
+					m.Post("", reqToken(), bind(api.ChangeFilesOptions{}), reqRepoBranchWriter, mustNotBeArchived, repo.ChangeFiles)
 					m.Get("/*", repo.GetContents)
 					m.Group("/*", func() {
-						m.Post("", bind(api.CreateFileOptions{}), reqRepoBranchWriter, repo.CreateFile)
-						m.Put("", bind(api.UpdateFileOptions{}), reqRepoBranchWriter, repo.UpdateFile)
-						m.Delete("", bind(api.DeleteFileOptions{}), reqRepoBranchWriter, repo.DeleteFile)
+						m.Post("", bind(api.CreateFileOptions{}), reqRepoBranchWriter, mustNotBeArchived, repo.CreateFile)
+						m.Put("", bind(api.UpdateFileOptions{}), reqRepoBranchWriter, mustNotBeArchived, repo.UpdateFile)
+						m.Delete("", bind(api.DeleteFileOptions{}), reqRepoBranchWriter, mustNotBeArchived, repo.DeleteFile)
 					}, reqToken())
 				}, reqRepoReader(unit.TypeCode))
 				m.Get("/signing-key.gpg", misc.SigningKey)
diff --git a/routers/api/v1/repo/branch.go b/routers/api/v1/repo/branch.go
index c851525c0f..583b591d10 100644
--- a/routers/api/v1/repo/branch.go
+++ b/routers/api/v1/repo/branch.go
@@ -117,17 +117,13 @@ func DeleteBranch(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
-
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	if ctx.Repo.Repository.IsEmpty {
 		ctx.Error(http.StatusNotFound, "", "Git Repository is empty.")
 		return
 	}
 
-	if ctx.Repo.Repository.IsArchived {
-		ctx.Error(http.StatusForbidden, "", "Git Repository is archived.")
-		return
-	}
-
 	if ctx.Repo.Repository.IsMirror {
 		ctx.Error(http.StatusForbidden, "", "Git Repository is a mirror.")
 		return
@@ -157,10 +153,6 @@ func DeleteBranch(ctx *context.APIContext) {
 		}
 	}
 
-	if ctx.Repo.Repository.IsArchived {
-		ctx.Error(http.StatusForbidden, "IsArchived", fmt.Errorf("can not delete branch of an archived repository"))
-		return
-	}
 	if ctx.Repo.Repository.IsMirror {
 		ctx.Error(http.StatusForbidden, "IsMirrored", fmt.Errorf("can not delete branch of an mirror repository"))
 		return
@@ -216,17 +208,14 @@ func CreateBranch(ctx *context.APIContext) {
 	//     description: The old branch does not exist.
 	//   "409":
 	//     description: The branch with the same name already exists.
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	if ctx.Repo.Repository.IsEmpty {
 		ctx.Error(http.StatusNotFound, "", "Git Repository is empty.")
 		return
 	}
 
-	if ctx.Repo.Repository.IsArchived {
-		ctx.Error(http.StatusForbidden, "", "Git Repository is archived.")
-		return
-	}
-
 	if ctx.Repo.Repository.IsMirror {
 		ctx.Error(http.StatusForbidden, "", "Git Repository is a mirror.")
 		return
@@ -519,6 +508,8 @@ func CreateBranchProtection(ctx *context.APIContext) {
 	//     "$ref": "#/responses/notFound"
 	//   "422":
 	//     "$ref": "#/responses/validationError"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	form := web.GetForm(ctx).(*api.CreateBranchProtectionOption)
 	repo := ctx.Repo.Repository
@@ -727,6 +718,8 @@ func EditBranchProtection(ctx *context.APIContext) {
 	//     "$ref": "#/responses/notFound"
 	//   "422":
 	//     "$ref": "#/responses/validationError"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	form := web.GetForm(ctx).(*api.EditBranchProtectionOption)
 	repo := ctx.Repo.Repository
 	bpName := ctx.Params(":name")
@@ -1004,7 +997,7 @@ func DeleteBranchProtection(ctx *context.APIContext) {
 		return
 	}
 
-	if err := git_model.DeleteProtectedBranch(ctx, ctx.Repo.Repository.ID, bp.ID); err != nil {
+	if err := git_model.DeleteProtectedBranch(ctx, ctx.Repo.Repository, bp.ID); err != nil {
 		ctx.Error(http.StatusInternalServerError, "DeleteProtectedBranch", err)
 		return
 	}
diff --git a/routers/api/v1/repo/file.go b/routers/api/v1/repo/file.go
index ea311c3202..94e634461c 100644
--- a/routers/api/v1/repo/file.go
+++ b/routers/api/v1/repo/file.go
@@ -450,6 +450,8 @@ func ChangeFiles(ctx *context.APIContext) {
 	//     "$ref": "#/responses/notFound"
 	//   "422":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	apiOpts := web.GetForm(ctx).(*api.ChangeFilesOptions)
 
@@ -550,6 +552,8 @@ func CreateFile(ctx *context.APIContext) {
 	//     "$ref": "#/responses/notFound"
 	//   "422":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	apiOpts := web.GetForm(ctx).(*api.CreateFileOptions)
 
@@ -646,6 +650,8 @@ func UpdateFile(ctx *context.APIContext) {
 	//     "$ref": "#/responses/notFound"
 	//   "422":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	apiOpts := web.GetForm(ctx).(*api.UpdateFileOptions)
 	if ctx.Repo.Repository.IsEmpty {
 		ctx.Error(http.StatusUnprocessableEntity, "RepoIsEmpty", fmt.Errorf("repo is empty"))
@@ -806,6 +812,8 @@ func DeleteFile(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 	//   "404":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	apiOpts := web.GetForm(ctx).(*api.DeleteFileOptions)
 	if !canWriteFiles(ctx, apiOpts.BranchName) {
diff --git a/routers/api/v1/repo/issue.go b/routers/api/v1/repo/issue.go
index 05dfa45e3d..2bced1f233 100644
--- a/routers/api/v1/repo/issue.go
+++ b/routers/api/v1/repo/issue.go
@@ -631,6 +631,8 @@ func CreateIssue(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 	//   "422":
 	//     "$ref": "#/responses/validationError"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	form := web.GetForm(ctx).(*api.CreateIssueOption)
 	var deadlineUnix timeutil.TimeStamp
 	if form.Deadline != nil && ctx.Repo.CanWrite(unit.TypeIssues) {
diff --git a/routers/api/v1/repo/issue_attachment.go b/routers/api/v1/repo/issue_attachment.go
index 60e554990f..b4768004ad 100644
--- a/routers/api/v1/repo/issue_attachment.go
+++ b/routers/api/v1/repo/issue_attachment.go
@@ -153,6 +153,8 @@ func CreateIssueAttachment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 	//   "404":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	issue := getIssueFromContext(ctx)
 	if issue == nil {
@@ -238,6 +240,8 @@ func EditIssueAttachment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/Attachment"
 	//   "404":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	attachment := getIssueAttachmentSafeWrite(ctx)
 	if attachment == nil {
@@ -292,6 +296,8 @@ func DeleteIssueAttachment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/empty"
 	//   "404":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	attachment := getIssueAttachmentSafeWrite(ctx)
 	if attachment == nil {
diff --git a/routers/api/v1/repo/issue_comment.go b/routers/api/v1/repo/issue_comment.go
index c9179e69db..8ef968c128 100644
--- a/routers/api/v1/repo/issue_comment.go
+++ b/routers/api/v1/repo/issue_comment.go
@@ -358,6 +358,8 @@ func CreateIssueComment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/forbidden"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	form := web.GetForm(ctx).(*api.CreateIssueCommentOption)
 	issue, err := issues_model.GetIssueByIndex(ctx, ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
 	if err != nil {
@@ -486,7 +488,8 @@ func EditIssueComment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/forbidden"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
-
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	form := web.GetForm(ctx).(*api.EditIssueCommentOption)
 	editIssueComment(ctx, *form)
 }
diff --git a/routers/api/v1/repo/issue_comment_attachment.go b/routers/api/v1/repo/issue_comment_attachment.go
index c30e8278db..63ed51c72d 100644
--- a/routers/api/v1/repo/issue_comment_attachment.go
+++ b/routers/api/v1/repo/issue_comment_attachment.go
@@ -156,6 +156,8 @@ func CreateIssueCommentAttachment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 	//   "404":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	// Check if comment exists and load comment
 	comment := getIssueCommentSafe(ctx)
@@ -245,7 +247,8 @@ func EditIssueCommentAttachment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/Attachment"
 	//   "404":
 	//     "$ref": "#/responses/error"
-
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	attach := getIssueCommentAttachmentSafeWrite(ctx)
 	if attach == nil {
 		return
@@ -297,7 +300,8 @@ func DeleteIssueCommentAttachment(ctx *context.APIContext) {
 	//     "$ref": "#/responses/empty"
 	//   "404":
 	//     "$ref": "#/responses/error"
-
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	attach := getIssueCommentAttachmentSafeWrite(ctx)
 	if attach == nil {
 		return
diff --git a/routers/api/v1/repo/issue_dependency.go b/routers/api/v1/repo/issue_dependency.go
index 5ea3836da1..9571532800 100644
--- a/routers/api/v1/repo/issue_dependency.go
+++ b/routers/api/v1/repo/issue_dependency.go
@@ -187,6 +187,8 @@ func CreateIssueDependency(ctx *context.APIContext) {
 	//     "$ref": "#/responses/Issue"
 	//   "404":
 	//     description: the issue does not exist
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	// We want to make <:index> depend on <Form>, i.e. <:index> is the target
 	target := getParamsIssue(ctx)
@@ -246,6 +248,8 @@ func RemoveIssueDependency(ctx *context.APIContext) {
 	//     "$ref": "#/responses/Issue"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	// We want to make <:index> depend on <Form>, i.e. <:index> is the target
 	target := getParamsIssue(ctx)
diff --git a/routers/api/v1/repo/patch.go b/routers/api/v1/repo/patch.go
index 080908ab7e..9b5635d245 100644
--- a/routers/api/v1/repo/patch.go
+++ b/routers/api/v1/repo/patch.go
@@ -47,6 +47,8 @@ func ApplyDiffPatch(ctx *context.APIContext) {
 	//     "$ref": "#/responses/FileResponse"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	apiOpts := web.GetForm(ctx).(*api.ApplyDiffPatchFileOptions)
 
 	opts := &files.ApplyDiffPatchOptions{
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index 4f22a059a1..1439d48a8e 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -282,6 +282,8 @@ func CreatePullRequest(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 	//   "422":
 	//     "$ref": "#/responses/validationError"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	form := *web.GetForm(ctx).(*api.CreatePullRequestOption)
 	if form.Head == form.Base {
@@ -741,6 +743,8 @@ func MergePullRequest(ctx *context.APIContext) {
 	//     "$ref": "#/responses/empty"
 	//   "409":
 	//     "$ref": "#/responses/error"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	form := web.GetForm(ctx).(*forms.MergePullRequestForm)
 
@@ -1196,6 +1200,8 @@ func CancelScheduledAutoMerge(ctx *context.APIContext) {
 	//     "$ref": "#/responses/forbidden"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	pullIndex := ctx.ParamsInt64(":index")
 	pull, err := issues_model.GetPullRequestByIndex(ctx, ctx.Repo.Repository.ID, pullIndex)
diff --git a/routers/api/v1/repo/tag.go b/routers/api/v1/repo/tag.go
index 0c0a73698f..cd29937cb8 100644
--- a/routers/api/v1/repo/tag.go
+++ b/routers/api/v1/repo/tag.go
@@ -184,6 +184,8 @@ func CreateTag(ctx *context.APIContext) {
 	//     "$ref": "#/responses/empty"
 	//   "409":
 	//     "$ref": "#/responses/conflict"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	form := web.GetForm(ctx).(*api.CreateTagOption)
 
 	// If target is not provided use default branch
@@ -251,6 +253,8 @@ func DeleteTag(ctx *context.APIContext) {
 	//     "$ref": "#/responses/empty"
 	//   "409":
 	//     "$ref": "#/responses/conflict"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 	tagName := ctx.Params("*")
 
 	tag, err := repo_model.GetRelease(ctx.Repo.Repository.ID, tagName)
diff --git a/routers/api/v1/repo/wiki.go b/routers/api/v1/repo/wiki.go
index 4ea3fbd11d..8e5ecce310 100644
--- a/routers/api/v1/repo/wiki.go
+++ b/routers/api/v1/repo/wiki.go
@@ -52,6 +52,8 @@ func NewWikiPage(ctx *context.APIContext) {
 	//     "$ref": "#/responses/forbidden"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	form := web.GetForm(ctx).(*api.CreateWikiPageOptions)
 
@@ -128,6 +130,8 @@ func EditWikiPage(ctx *context.APIContext) {
 	//     "$ref": "#/responses/forbidden"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	form := web.GetForm(ctx).(*api.CreateWikiPageOptions)
 
@@ -234,6 +238,8 @@ func DeleteWikiPage(ctx *context.APIContext) {
 	//     "$ref": "#/responses/forbidden"
 	//   "404":
 	//     "$ref": "#/responses/notFound"
+	//   "423":
+	//     "$ref": "#/responses/repoArchivedError"
 
 	wikiName := wiki_service.WebPathFromRequest(ctx.PathParamRaw(":pageName"))
 
diff --git a/routers/web/repo/setting/protected_branch.go b/routers/web/repo/setting/protected_branch.go
index e0f2294a14..3138f2327b 100644
--- a/routers/web/repo/setting/protected_branch.go
+++ b/routers/web/repo/setting/protected_branch.go
@@ -285,7 +285,7 @@ func DeleteProtectedBranchRulePost(ctx *context.Context) {
 		return
 	}
 
-	if err := git_model.DeleteProtectedBranch(ctx, ctx.Repo.Repository.ID, ruleID); err != nil {
+	if err := git_model.DeleteProtectedBranch(ctx, ctx.Repo.Repository, ruleID); err != nil {
 		ctx.Flash.Error(ctx.Tr("repo.settings.remove_protected_branch_failed", rule.RuleName))
 		ctx.JSONRedirect(fmt.Sprintf("%s/settings/branches", ctx.Repo.RepoLink))
 		return
diff --git a/services/release/release.go b/services/release/release.go
index ac3acc9085..55cc7bfe2f 100644
--- a/services/release/release.go
+++ b/services/release/release.go
@@ -25,6 +25,16 @@ import (
 )
 
 func createTag(ctx context.Context, gitRepo *git.Repository, rel *repo_model.Release, msg string) (bool, error) {
+	err := rel.LoadAttributes(ctx)
+	if err != nil {
+		return false, err
+	}
+
+	err = rel.Repo.MustNotBeArchived()
+	if err != nil {
+		return false, err
+	}
+
 	var created bool
 	// Only actual create when publish.
 	if !rel.IsDraft {
diff --git a/services/repository/branch.go b/services/repository/branch.go
index 011dc5568e..3351252200 100644
--- a/services/repository/branch.go
+++ b/services/repository/branch.go
@@ -29,6 +29,11 @@ import (
 
 // CreateNewBranch creates a new repository branch
 func CreateNewBranch(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldBranchName, branchName string) (err error) {
+	err = repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	// Check if branch name can be used
 	if err := checkBranchName(ctx, repo, branchName); err != nil {
 		return err
@@ -246,6 +251,11 @@ func checkBranchName(ctx context.Context, repo *repo_model.Repository, name stri
 
 // CreateNewBranchFromCommit creates a new repository branch
 func CreateNewBranchFromCommit(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, commit, branchName string) (err error) {
+	err = repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	// Check if branch name can be used
 	if err := checkBranchName(ctx, repo, branchName); err != nil {
 		return err
@@ -267,6 +277,11 @@ func CreateNewBranchFromCommit(ctx context.Context, doer *user_model.User, repo
 
 // RenameBranch rename a branch
 func RenameBranch(ctx context.Context, repo *repo_model.Repository, doer *user_model.User, gitRepo *git.Repository, from, to string) (string, error) {
+	err := repo.MustNotBeArchived()
+	if err != nil {
+		return "", err
+	}
+
 	if from == to {
 		return "target_exist", nil
 	}
@@ -315,6 +330,11 @@ var (
 
 // DeleteBranch delete branch
 func DeleteBranch(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, gitRepo *git.Repository, branchName string) error {
+	err := repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	if branchName == repo.DefaultBranch {
 		return ErrBranchIsDefault
 	}
diff --git a/services/repository/files/patch.go b/services/repository/files/patch.go
index fdf0b32f1a..5ef0619636 100644
--- a/services/repository/files/patch.go
+++ b/services/repository/files/patch.go
@@ -95,6 +95,11 @@ func (opts *ApplyDiffPatchOptions) Validate(ctx context.Context, repo *repo_mode
 
 // ApplyDiffPatch applies a patch to the given repository
 func ApplyDiffPatch(ctx context.Context, repo *repo_model.Repository, doer *user_model.User, opts *ApplyDiffPatchOptions) (*structs.FileResponse, error) {
+	err := repo.MustNotBeArchived()
+	if err != nil {
+		return nil, err
+	}
+
 	if err := opts.Validate(ctx, repo, doer); err != nil {
 		return nil, err
 	}
diff --git a/services/repository/files/update.go b/services/repository/files/update.go
index f01092d360..2a08bcbace 100644
--- a/services/repository/files/update.go
+++ b/services/repository/files/update.go
@@ -65,6 +65,11 @@ type RepoFileOptions struct {
 
 // ChangeRepoFiles adds, updates or removes multiple files in the given repository
 func ChangeRepoFiles(ctx context.Context, repo *repo_model.Repository, doer *user_model.User, opts *ChangeRepoFilesOptions) (*structs.FilesResponse, error) {
+	err := repo.MustNotBeArchived()
+	if err != nil {
+		return nil, err
+	}
+
 	// If no branch name is set, assume default branch
 	if opts.OldBranch == "" {
 		opts.OldBranch = repo.DefaultBranch
diff --git a/services/wiki/wiki.go b/services/wiki/wiki.go
index c0183dd2b5..250b539080 100644
--- a/services/wiki/wiki.go
+++ b/services/wiki/wiki.go
@@ -79,6 +79,11 @@ func prepareGitPath(gitRepo *git.Repository, wikiPath WebPath) (bool, string, er
 
 // updateWikiPage adds a new page or edits an existing page in repository wiki.
 func updateWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldWikiName, newWikiName WebPath, content, message string, isNew bool) (err error) {
+	err = repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	if err = validateWebPath(newWikiName); err != nil {
 		return err
 	}
@@ -238,6 +243,11 @@ func EditWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.R
 
 // DeleteWikiPage deletes a wiki page identified by its path.
 func DeleteWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, wikiName WebPath) (err error) {
+	err = repo.MustNotBeArchived()
+	if err != nil {
+		return err
+	}
+
 	wikiWorkingPool.CheckIn(fmt.Sprint(repo.ID))
 	defer wikiWorkingPool.CheckOut(fmt.Sprint(repo.ID))
 
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index 39c5a7fe11..4b43200bc6 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -3719,6 +3719,9 @@
           },
           "422": {
             "$ref": "#/responses/validationError"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -3857,6 +3860,9 @@
           },
           "422": {
             "$ref": "#/responses/validationError"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -3952,6 +3958,9 @@
           },
           "409": {
             "description": "The branch with the same name already exists."
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -4039,6 +4048,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -4596,6 +4608,9 @@
           },
           "422": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -4703,6 +4718,9 @@
           },
           "422": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -4761,6 +4779,9 @@
           },
           "422": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -4819,6 +4840,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -4866,6 +4890,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -6137,6 +6164,9 @@
           },
           "422": {
             "$ref": "#/responses/validationError"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -6352,6 +6382,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -6457,6 +6490,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -6559,6 +6595,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -6619,6 +6658,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -7067,6 +7109,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -7169,6 +7214,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -7229,6 +7277,9 @@
           },
           "404": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -7493,6 +7544,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -7771,6 +7825,9 @@
           },
           "404": {
             "description": "the issue does not exist"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -7819,6 +7876,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -10205,6 +10265,9 @@
           },
           "422": {
             "$ref": "#/responses/validationError"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -10639,6 +10702,9 @@
           },
           "409": {
             "$ref": "#/responses/error"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -10684,6 +10750,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -12725,6 +12794,9 @@
           },
           "409": {
             "$ref": "#/responses/conflict"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -12815,6 +12887,9 @@
           },
           "409": {
             "$ref": "#/responses/conflict"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -13475,6 +13550,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -13559,6 +13637,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       },
@@ -13613,6 +13694,9 @@
           },
           "404": {
             "$ref": "#/responses/notFound"
+          },
+          "423": {
+            "$ref": "#/responses/repoArchivedError"
           }
         }
       }
@@ -23903,6 +23987,17 @@
     "redirect": {
       "description": "APIRedirect is a redirect response"
     },
+    "repoArchivedError": {
+      "description": "APIRepoArchivedError is an error that is raised when an archived repo should be modified",
+      "headers": {
+        "message": {
+          "type": "string"
+        },
+        "url": {
+          "type": "string"
+        }
+      }
+    },
     "string": {
       "description": "APIString is a string response",
       "schema": {