I sometimes see poetry and art and word-based graffiti on the sides of prominent buildings and it's often inspiring and sometimes wonderful to see this.
A couple of examples of what I mean:
It seems to me that this has, in some cases (perhaps less often when it comes to graffiti) been officially sanctioned, and when I see a particularly interesting piece I think to myself 'yes, I'd like to do that too!'
Where do I apply (assuming I were wanting to do this in your part of the world) for permission to publish my writing on the sides of buildings?
NB I am not interested in the legal aspects of this matter; I simply want to know how to go about publishing my work on the sides of buildings as per the first example I gave.