My favourite piece of graffiti in Toronto

If you walk north on Queen Street past Church Street, on the west side you'll eventually see an impressive wall of graffiti. It acts as a mosaic of various spray-painted images, some incredibly complex, some wonderfully simple. I haven't investigated if the graf is courtesy of one person or several; anyone know the origin of this graffiti? And I'm always looking for interesting street art from other communities, so feel free to share your faves in the comment section below.