The city was founded by Portugal in 1485. It is centred on a sixteenth century cathedral. Another early building is Fort São Sebastião. It was built in 1575 and is now the São Tomé National Museum. In 1599, the city as well as the islands were captured by the Dutch for two days and again in 1641 for a year. São Tomé was the colony's capital until 1753. It has been the national capital since 1852.