St Francis church was originally part of a Franciscan monastery, and was alongside the Royal Palace. Today it can be found close to the Venetian Palace. It consists of a three-sided apse with a small chapel off the south side. Buttressing supported the external walls. It was built in the early years of the 14th century with funding supplied by Henry II, King of Cyprus who reigned from 1285 to 1324.
Henry's reign was far from peaceful. He saw the fall of Acre in 1291, his own imprisonment from 1306 to 1310, and the disbandment of the Knights Templars in 1313. In the latter years of his reign, however, not only did he fund the building of this church, but he saw the fortification of Famagusta, and the start of the rebuilding of St Nicholas Cathedral.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.