who completed the excavation were given the honorific of "Burrows" for their exceptional digging skills. Each langue of the Order had its own tower, each in its own style. Each tongue, each headed by a Bailiff, was responsible for the maintenance and defense of a specific portion of the fortress and for manning it with sufficient numbers of knights and soldiers. There were seven gates leading to the inner part of the fortress. The architect applied the latest features in castle design; the passages leading to the gates were full of twists and turns. Eventual assailants could not find cover against the arrows, stones or heated projectiles they had to confront. The knights had placed above the gates and on the walls hundreds of painted coats of arms and carved reliefs. Two hundred and forty-nine separate designs still remain, including those of grand masters, castle commandants, countries, and personal coat of arms of knights and religious figures. The construction of the three-storied English tower was finished in 1413. One door opens to the north, to the inner part of the castle, while the other leads to the western rampart. One could only access this tower via a drawbridge. The western façade shows an antique carved relief of a lion. Because of this relief, the tower was also called "the Lion Tower". Above this lion, one can see the coat of arms of King Henry IV of England. For over a century St. Peter's Castle remained the second most important castle of the Order. It served as a refuge for all Christians in Asia Minor. The castle came under attack with the rise of the Ottoman Empire, first after the fall of Constantinople in 1453 and again in 1480 by Sultan Mehmed II. The attacks were repelled by the Knights of St John. In 1482, Prince Cem Sultan, son of Sultan Mehmed II and brother of Sultan Bayezid II, sought refuge in the castle, after a failure in raising a revolt against his brother. When the Knights decided to fortify the castle in 1494, they used stones from the Mausoleum once again. The walls facing the mainland were thickened in order to withstand the increasing destructive power of cannon. The walls facing the sea were less thick, since the Order had little to fear from a sea attack due to their powerful naval fleet. Grand Master Fabrizio del Carretto (1513–21) built