Omdurman, Sudan, a city directly opposite Khartoum, the national capital, where the White Nile and Blue Nile rivers join to form the Nile. Major economic activities are the processing and shipping of cotton and grain. The College for Arabic and Islamic Studies and the tomb of Mohammed Ahmed, who claimed to be the Mahdi (Muslim messiah), are here.

Omdurman was founded as a camp in 1884 by the Mahdists, who were revolting against Turko-Egyptian rule. The city was taken by Lord Kitchener in 1898 shortly before the revolt ended.

Population: 228,778.