Portuguese built the first fort to withstand attack from the Sri Lankan kingdoms to the north. Dutch who captured the coastal cities from the Portuguese improved the defence system of the fort, widening the moat on the landside, improving the ramparts and the bastions. British who captured the city did not make many changes as they shifted the part to the northern town of Colombo and therefore the atmosphere of Dutch days are preserved to date.
The Dutch entrance to the fort with it VOC (Dutch: Vereenigde Oost-Indische Compagnie, VOC, "United East India Company") with 1669 carved in the inner archway is still in use. Still there are many old Dutch buildings intact and, but unfortunately except for those in the private hands. The ramparts and the bastions still bring to life the old world.