Russian federation, Novosibirsk, graffiiti on the wall in the center on the city. 

Graffiti has evolved into a pop culture existence often related to underground hip hop music, b-boying, and a lifestyle that remains hidden from the general public. Graffiti can be used as a gang signal to mark territory or to serve as an indicator or "tag" for gang-related activity. Controversies that surround graffiti continue to create disagreement amongst city officials/law enforcement and graffitists who wish to display and appreciate work in public locations.  (from here: http://en.wikipedia.org/wiki/Graffiti)