Writing on the Wall

I visited Woden in Canberra today. I enjoyed seeing some of the wall writing in a storm drain.

Many years ago, a teaching colleague specialised in the wall art in Belfast.

She used to discuss wall art as a statement about territory or aspiration.

I thought my find today opened up a third category ... attribution.

I wondered if this was created by a number of artists all acknowledge in the bottom right of the picture. A CC BY 2.0 perhaps?