Art, vandalism or gang sign?

I've been watching the slow and respectful renovation of this old commercial building. Suddenly the graffiti appeared.... I prefer the idea someone else on 365 mentioned, that some cities designate certain old buildings for graffiti.

Another shot of this building: http://365project.org/eudora/365/2011-12-03

[katy]

It is probably yes to all three!. cool shot, Diane!