Knight of Saint John – Jerusalem, 1099

The Order of Knights of the Hospital of Saint John of Jerusalem (Latin: Ordo Fratrum Hospitalis Sancti Ioannis Hierosolymitani), commonly known as the Knights Hospitaller (/ˈhɒspɪtələr/), was a medieval and early modern Catholic military order. It was headquartered in the Kingdom of Jerusalem until 1291, on the island of Rhodes from 1310 until 1522, in Malta from 1530 until 1798 and at Saint Petersburg from 1799 until 1801. Today several organizations continue the Hospitaller tradition, specifically the mutually recognized orders of St. John, which are the Sovereign Military Order of Malta, the Most Venerable Order of the Hospital of Saint John, the Bailiwick of Brandenburg of the Chivalric Order of Saint John, the Order of Saint John in the Netherlands, and the Order of Saint John in Sweden.

The Hospitallers arose in the early 12th century, during the time of the Cluniac movement (a Benedictine Reform movement). Early in the 11th century, merchants from Amalfi founded a hospital in the Muristan district of Jerusalem, dedicated to John the Baptist, to provide care for sick, poor, or injured pilgrims to the Holy Land. Blessed Gerard became its head in 1080. After the conquest of Jerusalem in 1099 during the First Crusade, a group of Crusaders formed a religious order to support the hospital. Some scholars consider that the Amalfitan order and hospital were different from Gerard’s order and its hospital.