Alauddin al-Kahar

Alauddin Ri'ayat Syah al-Kahar was the third Sultan of the Aceh Sultanate, reigning from either 1537 or 1539 until his death. He is considered to be one of the strongest rulers in the history of the sultanate and greatly strengthened Aceh. Alauddin's reign was marked by increased conflict with the Portuguese and their Malay and Sumatran allies and his dispatching of envoys to the Ottoman sultan, Suleiman the Magnificent in the 1560s.