Various artists
Mario Prinz
In this artwork we see inspirations of two artists Oscar Reutersvärd and Jos de Mey, who devoted their lives to impossible figures. A Reutersvärd's version of impossible triangle is depicted on the foreground. A bird, which sits on it, reminds us artworks by Jos de Mey, who frequently painted them on his artworks.
The image was found at http://home.vrweb.de/~mario.prinz/