Khartoum (state)
Khartoum State () is one of the eighteen states of Sudan. Although it is the smallest state by area (22,142 km), it is the most populous (5,274,321 in 2008 census). It contains the country's second largest city by population, Omdurman, and the city of Khartoum, which is the capital of the state as well as the national capital of Sudan. The capital city contains offices of the state, governmental and non-governmental organizations, cultural institutions, and the main airport.
Wau, South Sudan
In 2008, Wau was the third-largest city in South Sudan, by population, behind national capital Juba and Malakal, in Upper Nile State. At that time, the estimated population of the city of Wau was about 128,100. In 2011, the city's population was estimated at about 151,320.
Its Cathedral of St. Mary (built 1905, before the erection of the former Apostolic Prefecture of Bahr el-Ghazal) is the episcopal see of the Roman Catholic Diocese of Wau, which serves the province's religious majority.