5917904 Portrait of Mehmed IV (1642-1693), Sultan of the Ottoman Empire (w/c, ink, white and gold colours on paper) by Ottoman School, (17th century); Private Collection; (add.info.: Mehmed IV was the Sultan of the Ottoman Empire from 1648 to 1687. He came to the throne at the age of six after his father was overthrown in a coup. Mehmed went on to become the second longest reigning sultan in Ottoman history); Photo by Fine Art Images; Turkish, out of copyright.