Central Africa is home to the Democratic Republic of the Congo (DRC), also known as Congo-Kinshasa and formerly as Zaire. The DRC is the second-largest country in Africa by land area, after Algeria, and the eleventh-largest country in the globe. The Democratic Republic of the Congo is the most populous officially Francophone country in the globe, with a population of approximately 112 million. Kinshasa, the nation's capital and largest metropolis, is also the economic hub. Republic of the Congo, Central African Republic, South Sudan, Uganda, Rwanda, Burundi, Tanzania (across Lake Tanganyika), Zambia, Angola, the Cabinda exclave of Angola, and the South Atlantic Ocean form the country's borders.