Fatimid Caliphate

The Fatimid Caliphate or al-Fātimiyyūn (Arabic الفاطميون) was an Arab Shi 'a dynasty that ruled over varying areas of the Maghreb, Egypt, Sicily and the Levant from 5 January 909 to 1171. It was the fourth and final Arab caliphate. The caliphate was ruled by the Fatimids, who established the Egyptian city of Cairo as their capital. The term Fatimite is sometimes used to refer to the citizens of this caliphate. The ruling elite of the state belonged to the Ismaili branch of Shi 'ism. The leaders of the dynasty were also Shia Ismaili Imams, hence, they had a religious significance to Ismaili Muslims. They are also part of the chain of holders of the office of Caliph, as recognized by most Muslims, the only period in which the Shia Imamate and the Caliphate were united to any degree, excepting the Caliphate of Ali himself. With exceptions, the Fatimids were reputed to exercise a degree of religious tolerance towards non-Ismaili sects of Islam as well as towards Jews, Maltese Christians and Coptic Christians.

Source: http://en.wikipedia.org/wiki/Fatimid