East Africa is today an important world region of Islam, with a history reaching back to the earliest centuries of the faith. Although data are both unreliable and disputed, the 2014 edition of the CIA World Factbook indicates that Muslims are said to constitute approximately 11.1 percent of the population of Kenya (4.9 millions); 12.1 percent of Uganda (4.2 millions); 35 percent of Tanzania (16.8 millions); 4.6 percent of Rwanda (552,000); 2.5 percent of Burundi (270,000); perhaps ten percent of the