diff --git a/demos/gtk-demo/gtk2-ng-256.png b/demos/gtk-demo/gtk2-ng-256.png
new file mode 100644
index 000000000..68074aba6
Binary files /dev/null and b/demos/gtk-demo/gtk2-ng-256.png differ
diff --git a/demos/gtk-demo/gtk2-ng.svg b/demos/gtk-demo/gtk2-ng.svg
new file mode 100644
index 000000000..477522233
--- /dev/null
+++ b/demos/gtk-demo/gtk2-ng.svg
@@ -0,0 +1,27 @@
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diff --git a/demos/gtk-demo/gtk2-ng.svg.license b/demos/gtk-demo/gtk2-ng.svg.license
new file mode 100644
index 000000000..0e5166bb3
--- /dev/null
+++ b/demos/gtk-demo/gtk2-ng.svg.license
@@ -0,0 +1,20 @@
+gtk2-ng.svg is based on File:GTK.svg from Wikimedia Commons.
+
+Source:
+https://commons.wikimedia.org/wiki/File:GTK.svg
+
+Original source:
+Conversion of Image:GTK.png to SVG using Inkscape.
+
+Author:
+Jose Hevia, vectorised by DTR at English Wikipedia.
+Commons cleanup by Tene~commonswiki.
+
+License:
+Creative Commons Attribution-ShareAlike 3.0 Unported or
+GNU Free Documentation License 1.2 or later.
+
+This copy is included under the Creative Commons Attribution-ShareAlike
+3.0 Unported license.
+
+No endorsement by the original authors or Wikimedia Commons is implied.