diff --git a/src/web.lisp b/src/web.lisp
index 15c3e1d..bb6de6f 100644
--- a/src/web.lisp
+++ b/src/web.lisp
@@ -1446,6 +1446,42 @@
 			          `(:alert ,(utils:get-and-reset-alert)
 			            :nav-menu ,(nera:nav-menu-slugs)
 			            :system-data ,(nera:system-data)))))
+
+(defroute ("/sitemap.xml" :method :GET) ()
+  (setf (getf (response-headers *response*) :content-type) "application/xml")
+  (with-output-to-string (stream)
+    (let ((pages (nera:get-all-pages))
+          (entries (nera:get-all-archive-entries))
+          (root-url (utils:build-url-root ningle:*request*)))
+      (xml-emitter:with-xml-output (stream :encoding "utf-8")
+        (xml-emitter:with-simple-tag
+            ("urlset"
+             nil
+             "http://www.sitemaps.org/schemas/sitemap/0.9")
+          ;; Lists all the pages first.
+          ;; The 'unless' block is to remove pages which are not wanting to be
+          ;; part of a search engine's crawler results.
+          (loop for item in pages
+                do
+                   (unless (or (string= "sign-up" (pages::slug-of item))
+                               (string= "login" (pages::slug-of item)))
+                     (xml-emitter:with-tag ("url")
+                       (xml-emitter:emit-simple-tags
+                        :loc (format nil "~a/view/page/~a"
+                                     root-url (pages::slug-of item))
+                        :lastmod
+                        (format nil "~a" (mito.dao.mixin:object-updated-at item))))))
+          ;; Lists all the archive entries second.
+          (loop for item in entries
+                do
+                   (xml-emitter:with-tag ("url")
+                     (xml-emitter:emit-simple-tags
+                      :loc (format nil "~a/view/archive/~a"
+                                   root-url (archive::slug-of item))
+                      :lastmod
+                      (format nil "~a"
+                              (mito.dao.mixin:object-updated-at item))))))))))
+
 ;;
 ;; Error pages