Kingdom of Hejaz
From 1902 until his death in 1953, Saudi Arabia's founding father, Abdulaziz, ruled the Emirate of Riyadh (1902-13), the Emirate of Nejd and Hasa (1913-21), the Sultanate of Nejd (1921-26), the Kingdom of Hejaz and Nejd (1926-32) and finally as King of Saudi Arabia (1932-1953).