Monument for Cemal Kemal Altun, a Turkish refugee who ended his life after being negated asylum in Germany. For more on his life check his German wikipedia entry.
The sculpture is located in Berlin Hardenbergstrasse, inaugurated in 1996.

http://akbarbehkalam.de/files/gimgs/th-25_Altun1.jpg
http://akbarbehkalam.de/files/gimgs/th-25_Altun2.jpg
http://akbarbehkalam.de/files/gimgs/th-25_Altun3.jpg