Fragment of a glazed blue tile with Buyanquli Khan's name. Carved earthenware under coloured glaze, from a frieze around the entrance of the mausoleum at Bukhara in Uzbekistan that was erected over his grave. Buyanquli Khan was a Muslim descendant of the great Mongol conqueror Genghis Khan. He was assassinated in 1358 when he tried to assert his own authority. His tomb was built in a cemetery on the outskirts of Bukhara. Photo via Newscom