By the 11th century, the Muslim world had developed four major Sunni schools of Islamic jurisprudence (or fiqh), each with its own interpretations of Sharia: Hanbali, Maliki, Shafi and Hanafi. In Arabia, a preference for the Hanbali school was advocated by the Wahhabi movement, founded in the 18th century. Wahhabism, a strict form of Sunni Islam, was supported by the Saudi royal family (the Al Saud) and is now dominant in Saudi Arabia. From the 18th century, the Hanbali school therefore predominated in Nejd and central Arabia, the heartland of Wahhabi Islam. In the more cosmopolitan Hejaz, in the west of the peninsula, both the Hanafi and Shafi schools were followed.