From Europe, the legend maintains that the returning crusaders brought the Saluki-type dogs from the Middle East. The painting of Henry IV, Duke of Saxony with his hunting dog, painted by Lucas Cranach the Elder in 1514, shows a dog thought by some to represent an ancestral Saluki. The dog wears a collar decorated with a scallop shell, which is the badge of a pilgrim who has traveled the Way of Saint James in Spain. Saluki-type dogs appear in Paolo Veronese's 1573 work "The Adoration of the Magi" (also known as the "Adoration of the Kings"), currently located at the National Gallery, London. Veronese painted such dogs in another two of his religious paintings: "The Marriage at Cana" and "The Finding of Moses". Sheik Hamad ibn Isa Al Khalifa, King of Bahrain during the 1930s, was known for a pack of Salukis that accompanied him throughout the Arab world on hunting trips. Following his death, his son Salman ibn Hamad Al Khalifa attempted to keep the lines pure-bred but they became interbred with other breeds. However, the pure-bred lines of the royal kennel were saved by the efforts of Dana Al Khalifa who was given two pure-bred puppies by the King, and about a decade later had pure-bred Salukis registered with the Kennel Club of Bahrain. Today, the breed is still held in high regard throughout the Middle East and were hunting dogs for nobles and rulers around the region. Although Muslims traditionally regarded dogs as unclean, they made an exception for the Saluki to live in the family tent. They are considered clean by the Bedouins, and are allowed to be in women's quarters, while other dogs must be kept outside. Saluki has never been sold, but it could be presented as a mark of honor to people. In 2014, a DNA study compared dogs and wolves for AMY2B (alpha amylase 2B), which is a gene and enzyme that assists with the first step in the digestion of dietary starch and glycogen. An expansion of this gene in dogs would enable early dogs to exploit a starch-rich diet as they fed on refuse from agriculture. Data indicated that the wolves and dingo had just two copies of the gene and the Siberian husky that is associated with hunter-gatherers had just 3–4 copies, "whereas the saluki, which was historically bred in the Fertile Crescent where agriculture originated, has 29 copies".