diff --git a/_includes/datacoopbanner.html b/_includes/datacoopbanner.html
new file mode 100644
index 0000000..ddadc2f
--- /dev/null
+++ b/_includes/datacoopbanner.html
@@ -0,0 +1,2 @@
+<div class="ribbonbanner shadow">Brought to you by <br />
+<a href="https://data.coop">data.coop</a></div>
\ No newline at end of file
diff --git a/_layouts/default.html b/_layouts/default.html
index 7027ead..c53aa0e 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -9,6 +9,7 @@
     <link rel="stylesheet" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
   </head>
   <body>
+    {% include datacoopbanner.html %}
     <section class="page-header">
       <h1 class="project-name"><a href="/">{{ site.title }}</a></h1>
       <h2 class="project-tagline">{{ site.description }}</h2>
diff --git a/_sass/banners.scss b/_sass/banners.scss
new file mode 100644
index 0000000..e588685
--- /dev/null
+++ b/_sass/banners.scss
@@ -0,0 +1,15 @@
+.ribbonbanner {
+    padding: 10px 55px;
+    text-align: center;
+    position: absolute;
+    color: $header-heading-color;
+    background-color: $header-bg-color;
+    transform: rotate(-45deg);
+    top: 28px;
+    left: -60px;
+
+    a {
+        color: $header-heading-color;
+        text-decoration: underline;
+    }
+}
\ No newline at end of file
diff --git a/_sass/jekyll-theme-xmpp.scss b/_sass/jekyll-theme-xmpp.scss
index 79892db..6e02de9 100644
--- a/_sass/jekyll-theme-xmpp.scss
+++ b/_sass/jekyll-theme-xmpp.scss
@@ -1,6 +1,8 @@
+@import "variables";
 @import "normalize";
 @import "rouge-github";
-@import "variables";
+@import "banners";
+
 
 @mixin large {
   @media screen and (min-width: #{$large-breakpoint}) {
@@ -405,3 +407,7 @@ aside nav {
 .site-footer-credits {
   color: $blockquote-text-color;
 }
+
+.shadow { 
+  box-shadow: 0 0 3px rgba(0,0,0,0.3); 
+}
\ No newline at end of file
