"So that subway facade is now considered the last work that was done by Iz the Wiz, arguably the most prolific graffiti artist, and was the site of a candlelight memorial service several days after his death.Tuff City employees are deciding how to preserve the panels — whether to donate them to a museum, make them part of a traveling exhibit or disassemble them for galleries. Inquiries about the panel have come in from around the world. “We’re not sure what is going to happen with it yet,�? Mr. Brick said. “We just know it is not going to be painted over.�?
The full NY Times article "about Iz´s last work before he died here