diff --git a/_includes/head-custom.html b/_includes/head-custom.html
index 43c8157..060db1f 100644
--- a/_includes/head-custom.html
+++ b/_includes/head-custom.html
@@ -104,6 +104,10 @@
 
 <!-- ==================== SHARED END =============================================== -->
 
+<!-- Favicon: the di.uoa.gr mark with a book badge, one per course site. -->
+<link rel="icon" href="{{ "/favicon.ico" | relative_url }}" sizes="any">
+<link rel="apple-touch-icon" href="{{ "/apple-touch-icon.png" | relative_url }}">
+
 <style>
   /* The figures are line drawings with a transparent background; give them a white
      card so they stay legible whatever the page background, and keep wide ones
diff --git a/apple-touch-icon.png b/apple-touch-icon.png
new file mode 100644
index 0000000..6aae6f4
Binary files /dev/null and b/apple-touch-icon.png differ
diff --git a/favicon.ico b/favicon.ico
new file mode 100644
index 0000000..7f898d0
Binary files /dev/null and b/favicon.ico differ