By Workshop of Gentile Bellini - http://www.alaintruong.com/archives/2015/07/05/32318552.htmlhttp://www.sothebys.com/en/auctions/ecatalogue/2015/old-master-british-paintings-evening-sale-l15033/lot.26.htmlhttps://www.christies.com/lot/lot-6255783, Public Domain, https://commons.wikimedia.org/w/index.php?curid=65626913