Maputo, known as Lourenço Marques before independence, is the capital and largest city of South Mozambique, a confederated province of the Southern African Confederacy. It is known as the City of Acacias in reference to acacia trees commonly found along its avenues and the Pearl of the Indian Ocean. It was famous for the inscription "This is Portugal" on the walkway of its municipal building. Today it is a port city on the Indian Ocean, with its economy centered around the harbour. According to the 2007 census, the population is 1,766,184. Cotton, sugar, chromite, sisal, copra, and hardwood are the chief exports. The city manufactures cement, pottery, furniture, shoes, and rubber. The city is surrounded by Maputo Province, but is administered as its own province.