Knights Hospitaller (Rhodes Period)

Timeline

1. 1306–1309Rhodes · Aegean SeaAfter the fall of Acre in 1291 and the collapse of the Crusader states, the Hospitallers were based in Cyprus. Grand Master Fulk de Villaret plotted the seizure of Rhodes from 1306, landing with ships supplied by the Genoese merchant Vincenzo Zecchi. After three years of fighting, the Order gained full control of Rhodes and the main Dodecanese islands in 1309, converting them into a maritime military base in the eastern Mediterranean and a base for piracy and sanctions against Muslim shipping.
2. 1480–1481City of Rhodes · RhodesFrom May to August 1480, Ottoman Sultan Mehmed II sent roughly 70,000 troops to besiege Rhodes. Grand Master Pierre d'Aubusson led some 500 knights and several thousand auxiliaries in defense, successfully repelling the Ottoman attack despite breaches in the walls caused by bombardment. The successful defense caused a great sensation in Christian Europe, and d'Aubusson was granted a cardinal's title by the pope. Mehmed II's sudden death in 1481 temporarily lifted the pressure, and the Order immediately began large-scale fortification works.
3. 1481–1521City of Rhodes · RhodesAfter the 1480 siege, the Order recognized that traditional medieval walls could not withstand increasingly sophisticated Ottoman artillery. Grand Master Emery d'Amboise (1503–1512) hired Italian military architects (including Bastiano di Sangallo) to add low, thick bastions in front of the existing walls, designed to absorb cannon shot and provide flanking fire. Between 1511 and 1520, Grand Master Fabrizio del Carretto (1513–1521) continued the work: the Spanish, Italian, and English bastions were successively completed and the moats widened and deepened, making the Rhodes fortress one of Europe's most advanced examples of artillery-era fortification and sparking continent-wide discussion of fortress design reform.
4. 1522–1523Rhodes (and withdrawal destination Malta) · RhodesIn June 1522, Suleiman I landed on Rhodes with roughly 100,000 Ottoman troops, launching one of the largest sieges in history. Grand Master Philippe de Villiers de l'Isle-Adam led some 7,000 defenders who resisted for nearly six months, inflicting heavy Ottoman casualties using the fortress system completed in 1511–1520. However, a traitor within the garrison leaked plans of the defenses, and reinforcements failed to arrive; on December 22 the Order negotiated surrender with Suleiman and was permitted an honorable withdrawal with arms and banners. The Order formally left the island on January 1, 1523, moved to Malta in 1530, and continues to this day under the name Knights of Malta.