The walls of the city were a work in progress for the 200 years the Knights ruled the island. Severely damaged in the first siege they were rebuilt bigger and stronger by Grande Master d'Aubusson after the siege of 1480. The walls are 12 meters thick and the moat more than 21 meters wide. The length of the walls is about four kilometers and each section was defended by one of the Langues or tongues which corresponded to the languages spoken where the particular group of knights came from. The Langues were England, Germany, France, Auvergne, Provence, Italy, Castille-Aragon. The leader of each tongue reported to the Grande Master. The entire area outside the walls is a green park of shade trees and flowers and the moats now have green grass and paths through them instead of water. A couple times a week there is a tour of the city walls and fortifications. But leaving through any of the gates and walking around the old city will give you an idea of just how impressive and formidable it was to the Turkish soldiers trying to take it.