diff --git a/404.html b/404.html
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+++ b/404.html
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+<!DOCTYPE html>
+<html lang='en'>
+<head>
+  <title>Page not found  - Johannes Olzem</title>
+  <meta name='description' content="Johannes Olzem's Webspace.">
+  <meta charset='utf-8'>
+  <link rel='stylesheet' href='/css/style.css'>
+  <meta name='viewport' content='width=device-width, initial-scale=1.0'>
+  <link rel='icon' href='/favico.ico'>
+</head>
+<body>
+  <header>
+    <a href='/'>Johannes Olzem's Webspace</a>
+  </header>
+  <nav>
+    <a href='/blog/'>Blog</a>
+    <a href='/about/'>About Me</a>
+    <a href='/contact/'>Contact</a>
+  </nav>
+  <main>
+    <h1>404 Error</h1>
+    <p>The page you requested couldn't be found. </p>
+    <a href='/'>Return to homepage</a>
+  </main>
+  <footer>
+    <h6><a href><script>document.write(window.location.href);</script></a></h6>
+  </footer>
+</body>
+</html>
