The port town of Galle is Sri Lanka's fourth biggest town with 80,000 people. The history of Galle dates back to 1505 when a Portuguese fleet bound for Maldives was blown off course and took shelter in the Galle Harbour. This arrival drastically changed the course of Sri Lankan history. In 1598, the Portuguese built a small fort which was later extended. However, when the Dutch took over in 1640, they destroyed all traces of the Portuguese presence. In 1663, the Dutch built the 36-hectare Fort, which is now a World Heritage Site.