From 1978 to the present, outspoken critic of American society, Louis Farrakhan (born as Louis Eugene Walcott), has been the leader of a reconstituted Nation of Islam, the original organization having been renamed and dissolved by Warith Deen Muhammad. The Nation of Islam's National Center and headquarters is located in Chicago, Illinois, and is also home to its flagship Mosque No. 2, Mosque Maryam.
The original Nation of Islam was founded in Detroit, Michigan in 1930 by Wallace Fard Muhammad also known as Master W. D. Fard Muhammad (1877-1934 or later). The Nation of Islam teaches that W. Fard Muhammad is both the "Messiah" of Christianity and the Mahdi of Islam. One of Fard's first disciples was Elijah Muhammad (1897-1975), who led the organization from 1935 through 1975.
By the time Elijah Muhammad died there were 75 NOI centers across the United States.
Nation of Islam official website