Dom Joseph Nasi (or Nassi; also known as João Miques/Micas and Dom João Migas Mendes in a Portuguese variant, Giuseppe Nasi in Italian, and as Yasef Nassi in Ottoman Turkish; 1524, Portugal – 1579, Constantinople) was a Portuguese Sephardi diplomat and administrator, member of the House of Mendes/Benveniste, nephew of Dona Gracia Mendes Nasi, and an influential figure in the Ottoman Empire during the rules of both Sultan Suleiman I and his son Selim II. He was a great benefactor of the Jewish people.[1]