http://www.log24.com/log/pix09A/091127-BlackSquare256.jpg

http://www.log24.com/log/pix09A/091127-BlackCross-Malevich.jpg

http://www.log24.com/log/pix09A/091127-Malevich256sq.jpg

Black Square,
Black Cross,
Malevich

Related material:

Eid al-Adha,
The Social Aspect of Eid, and
Homage to Malevich