Simplify the following text for a Grade 8 native English-speaking person.
Original: Suleiman I ( ; SuleymÄ n , Modern Turkish : SÃ 1\/4 leyman , almost always Kanuni Sultan SÃ 1\/4 leyman ; 6 November 1494 - 5\/6\/7 September 1566 ) was the tenth and longest-reigning Sultan of the Ottoman Empire , from 1520 to his death in 1566 .
Simplified: Ø Ù SulaymÄ n , SÃ 1\/4 leyman ; almost always Kanuni Sultan SÃ 1\/4 leyman in Turkish ) ( November 6 , 1494 â `` September 5\/6 , 1566 ) , was the tenth Sultan of the Ottoman Empire . He reigned from 1520 to 1566 .