diff --git a/404.php b/404.php
index 7584480..c76b447 100644
--- a/404.php
+++ b/404.php
@@ -7,6 +7,15 @@ http_response_code(404);
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Seite nicht gefunden · Fabian Schieder</title>
+
+    <!-- Favicons: mehrere Größen + /favicon.ico Fallback (Browser-Caching) -->
+    <link rel="icon" href="/favicon.ico" sizes="any">
+    <link rel="shortcut icon" href="/favicon.ico">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="16x16">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="32x32">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="48x48">
+    <link rel="apple-touch-icon" href="/icons/favicon.png" sizes="180x180">
+
     <link rel="stylesheet" href="/style.css">
     <style>
         body {
diff --git a/503.php b/503.php
index 20a74ef..b026e21 100644
--- a/503.php
+++ b/503.php
@@ -7,6 +7,15 @@ http_response_code(503);
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Dienst nicht verfügbar · Fabian Schieder</title>
+
+    <!-- Favicons: mehrere Größen + /favicon.ico Fallback (Browser-Caching) -->
+    <link rel="icon" href="/favicon.ico" sizes="any">
+    <link rel="shortcut icon" href="/favicon.ico">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="16x16">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="32x32">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="48x48">
+    <link rel="apple-touch-icon" href="/icons/favicon.png" sizes="180x180">
+
     <link rel="stylesheet" href="/style.css">
     <style>
         body {
diff --git a/favicon.ico b/favicon.ico
new file mode 100644
index 0000000..e69de29
diff --git a/includes/views/layout_head.php b/includes/views/layout_head.php
index 7e6fe66..3782e09 100644
--- a/includes/views/layout_head.php
+++ b/includes/views/layout_head.php
@@ -5,11 +5,14 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Fabian Schieder</title>
 
-    <!-- Favicons: mehrere Größen, damit es überall scharf/gleich aussieht -->
-    <link rel="icon" href="/icons/favicon.png" type="image/png">
+    <!-- Favicons: mehrere Größen + /favicon.ico Fallback (Browser-Caching) -->
+    <link rel="icon" href="/favicon.ico" sizes="any">
+    <link rel="shortcut icon" href="/favicon.ico">
+
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="16x16">
     <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="32x32">
-    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="64x64">
-    <link rel="apple-touch-icon" href="/icons/favicon.png" sizes="360x360">
+    <link rel="icon" href="/icons/favicon.png" type="image/png" sizes="48x48">
+    <link rel="apple-touch-icon" href="/icons/favicon.png" sizes="180x180">
 
     <link rel="stylesheet" href="/style.css">
 </head>