It's kind of romantic in a way. :)
Because he used to be chased out by the police for his "vandalism"; which now worth hundreds of thousands of pounds and very well conserved.. Talking about irony.. So, I feel the exhibition title and design below is perfect for this exhibition.

And here's a glimpse of what you might see in the Bristol exhibition.


BANKSY is also known for his headline-making stunts, such as leaving an inflatable doll dressed as a Guantanamo prisoner in Disneyland, California, and hanging a version of the Mona Lisa - but with a smiley face - in the Louvre, Paris.
The six figures price tag is just an added bonus, a form of appreciation. But the best thing is that he gets his honest message across, and it is not politicize by any one.
Here is my personal favorite, his stencil graffiti at the West Bank barrier separating Israelis and Palestinians.

A very deep, honest, thought provoking and amusing street art. Love it! :)
for further reading & images are taken from here, trendhunter; dailymail; bbc; bbc; MIL