Introduction to Galle Castle: Galle Castle is built on a circular headland facing the sea. Long before the Europeans discovered this treasure, it was already an important place for fleets and cargo ships from various countries traveling along the Maritime Silk Road. One of the stops. The new city gate on the north side of Galle Castle is the main entrance and exit of the Galle City Wall. It is also the newest part of the city wall. It was added by the British in 1873 to facilitate vehicle entry and exit.