São Luís (lit. Saint Louis) is the capital of the Brazilian state of Maranhão. The city is located on São Luís island in the Baía de São Marcos (St Marcus Bay), an extension of the Atlantic Ocean which forms the estuary of Pindaré, Mearim, Itapecuru and other rivers. São Luís is the only Brazilian state capital founded by France (see France Équinoxiale) and it is one of the three Brazilian state capitals located on islands (the others are Vitória and Florianópolis). The city has sea ports Ponta da Madeira and Porto do Itaqui, through which a substantial part of Brazil's iron ore, originating from the (pre)-Amazon region, is exported. The city's main industries are metallurgical with Alumar, and Vale do Rio Doce. São Luís is home of the Federal University of Maranhão. São Luís was the home town of famous Brazilian Samba singer Alcione, Brazilian writers Aluísio Azevedo, Ferreira Gullar and Josué Montello, Belgian-naturalised soccer player Luís Oliveira, the musician João do Vale and Zeca Baleiro, a Música Popular Brasileira (MPB) singer.