Sultan Ahmed I He took the throne at the age of 13 and broke with the Ottoman tradition of fratricide upon his enthronement. Due to several disastrous wars, the Ottoman Empire began to lose territory under his rule.. Mausoleum was constuctd after Sultan Ahmed I (1603-1617) death, completed 1619. This is the resting place of Sultan Ahmet I, renowned for commissioning the Blue Mosque, Buried with Ahmet are his wife, Kösem, who was strangled to death in the Topkapı Harem, and his sons, Sultan Osman II (r 1618–22), Sultan Murat IV (r 1623–40) and Prince Beyazıt (murdered by order of Murat).