Despite years in the international spotlight, remarkably little is known about Banksy.
A rat holding an umbrella is one of Banksy's most famous artworks.
The museum will not charge the public to see the painting.
Some of Banksy's works in Paris were vandalised soon after they were put up, while others were protected by screens.
The subversive artist confirmed on Instagram that the "Season's Greetings" mural on a breeze block garage wall was genuine.
The secretive artist admitted on a video posted on his Instagram account this week that the real answer; the painting got stuck.
Some have even suggested that it was Banksy himself who successfully bid for his own painting at auction -- with the final buyer known to be on the telephone.
Banksy posted his own photo from midway through the shredding on his Instagram page early Saturday, showing onlookers aghast at the stunt.
A mural sporting Banksy's alleged signature in a declining town in Spain that had caused a sensation is not by the legendary street artist.
Banksy's latest art spotlights his view on France's stance towards migrants.
The local council said the owner had confirmed the mural was damaged during urgent works on the end-of-terrace home, which was given protected status after the mural appeared overnight in April 2014.
Shared widely on social media, they have sparked copycat variations and struck a chord with Malaysians outraged by corruption allegations levelled at Najib and his moves to thwart investigations.