diff --git a/errors/401.php b/errors/401.php
new file mode 100644
index 0000000..c36902c
--- /dev/null
+++ b/errors/401.php
@@ -0,0 +1,25 @@
+<?php
+ob_start(); // Start reading html
+$relativePath = "../";
+
+?>
+<div class="inner">
+    <h1>Acces non autorise</h1>
+    <h2>Erreur 401</h2>
+
+    <p>
+        Vous n'avez pas le droit d'accéder à cette page
+    </p>
+
+    <a href="<?= $relativePath ?>index.php" class="website-back-button">
+        Retour sur le site
+    </a>
+</div>
+
+<?php
+$pageContent = ob_get_clean(); // Store html content in variable
+$pageTitle = "Erreur 401";
+
+include($relativePath . "includes/template.php"); // Display template with variable content
+
+?>
diff --git a/errors/404.php b/errors/404.php
new file mode 100644
index 0000000..5a8e7f0
--- /dev/null
+++ b/errors/404.php
@@ -0,0 +1,21 @@
+<?php
+ob_start(); // Start reading html
+$relativePath = "../";
+
+?>
+<div class="inner">
+    <h1>Page non trouvee</h1>
+    <h2>Erreur 404</h2>
+
+    <a href="<?= $relativePath ?>index.php" class="website-back-button">
+        Retour sur le site
+    </a>
+</div>
+
+<?php
+$pageContent = ob_get_clean(); // Store html content in variable
+$pageTitle = "Erreur 404";
+
+include($relativePath . "includes/template.php"); // Display template with variable content
+
+?>