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Preparations Mehmed, whose great-grandfather Bayezid I had previously built a fortress on the Asian side of the Bosporus called Anadolu Hisarı, now built a second castle outside the walls of Constantinople on the European side, which would increase Turkish influence on the straits. An especially relevant aspect of this fortress was its ability to prevent help from Genoese colonies on the Black Sea coast from reaching the city. This castle was called Rumeli Hisarı; Rumeli and Anadolu being the names of European and Asian portions of the Ottoman Empire, respectively. The new fortress is also known as Boğazkesen which has a dual meaning in Turkish; strait-blocker or throat-cutter, emphasizing its strategic position. The Greek name of the fortress, Laimokopia, also bears the same double-meaning. Constantine appealed to Western Europe for help, but his request did not meet the expected attention. Ever since the mutual excommunication of the Orthodox and Roman Catholic churches in 1054, the Roman Catholic west had been trying to re-integrate the east; union had been attempted before at Lyons in 1274 and, indeed, some Paleologan emperors had been received in the Latin Church since. Emperor John VIII Palaeologus had attempted to negotiate Union with Pope Eugene IV, and the Council held in 1439 resulted in the proclamation, in Florence, of a Bull of Union. In the following years, a massive propaganda initiative was undertaken by anti-unionist forces in Constantinople and the population was in fact bitterly divided. Latent ethnic hatred between Greeks and Italians stemming from the stranglehold the Italians had over the Byzantine economy and the sack of Constantinople in 1204 also played a significant role, and finally the Union failed, greatly annoying Pope Nicholas V and the Roman Catholic church. Map showing Constantinople and its walls.However, even if he had been more eager to help, Pope Nicholas V did not have the influence the Byzantines thought he had over the Western Kings and princes, and these had not the wherewithal to contribute to the effort, especially in light of France and England being weakened from the Hundred Years' War, Iberian Kingdoms being in the final part of the Reconquista, the internecine fighting in the German Principalities, and Hungary and Poland's defeat at the Battle of Varna of 1444. Although some troops did arrive from the city states of what today is the north of Italy, the Western contribution was not adequate to counterbalance the Ottoman strength. The Byzantine army itself totalled about 7000 men, 2000 of whom were foreign mercenaries. The city also had fourteen miles of walls, probably the strongest set of fortified walls in existence at the time. The Ottomans, on the other hand, had a larger force. It was thought to be numbering around 100,000, including 20,000 Janissaries, but recent estimates cite 80,000 soldiers and 5,000 Janissaries. Mehmed also built a fleet to besiege the city from the sea, comprising mostly Greek soldiers. The Ottomans employed a Hungarian engineer called Urban who was a specialist in the construction of cannons, which were still relatively new weapons. He built an enormous cannon, nearly twenty-seven feet (more than 8 m) in length and 2.5 feet (about 75 cm) in diameter, which could fire a 1200 lb (544 kg) ball as far as one mile. It was dubbed "the Basilic". Although the Byzantines also had cannons, they were much smaller and their recoil tended to damage their own walls. Urban's cannon had several drawbacks, however. It could hardly hit anything, not even as large as Constantinople; it took three hours to reload; the cannon balls were in very short supply; and the cannon collapsed under its own recoil after six weeks. Another expert that was employed by the Ottomans was Ciriaco de Pizzicoli, also known as Ciriaco of Ancona, traveller and collector of antiquities. |