I've been searching for the creator of this one ever since someone sent it to me ages ago (thanks a lot to Stephen Smith for identifying the artist for me!). This is Jester in Venice, by Ciro Marchetti, displayed with his kind permission. I love it not only for the jewellike colour palette but because the artist has such great insight into the nature of the jester. His website is also recommended - you'll find plenty more artwork with jester themes and motifs.