Saudi Arabia is a unification of what were separate Arab states.
They unified as Saudi Arabia in 1932.
Prior to the unification there was a 30 year campaign to unify the separate states.
Founder of Saudi Arabia, Ibn Saud, with President Roosevelt along the Suez Cannal in 1945 discussing primary relations between U.S. and Saudi Arabia
http://www.globalsecurity.org/military/world/gulf/abdulaziz.htm
Current map Saudi Arabia, with its capital Riyadh
located near is center. It has coasts along the Red Sea and Persian Gulf.
http://susris.com/2013/10/01/reflections-on-the-saudi-arabia-few-get-to-see-amb-james-smith/
Muslim pilgrims at the Kaaba in the Holy city of Mecca performing final walk in 2011.
http://www.globalpost.com/dispatch/news/regions/middle-east/saudi-arabia/111103/hajj-iranian-pilgrims-deported-saudi-arabia