Banksy is a very talented stencil Graffiti artist from Bristol, UK and his identity is a closely guarded secret. His work has become so sought after that many of the building that he has painted on have increased significantly in value. This doesn't stop the council whitewashing over it despite the fact that not only does his work raise the value of buildings, but it also brings in tourists!  Banksy has created art in North America, Europe, and Asia.
Examples of work
In 2010, Banksy was credited with creating the documentary Exit Through The Gift Shop.
I'm never sure who deserves to be put on a pedestal or crushed under one. (…) The statue? I guess you could call it a Christmas present. At this time of year it's easy to forget the true meaning of Christianity - the lies, the corruption, the abuse.  
Naturally the Roman Catholics find the message offensive.
See links below which include photos of the statue:-
A theme park by Banksey titled, "Dismaland" is very popular and there are long queues.