The Knights Hospitaller (also known as the Sovereign Military Hospitaller Orer of St. John of Jerusalem of Rhodes and of Malta, Order of St. John, Knights of Malta, and Chevaliers of Malta; French: Ordre des Hospitaliers) was a Christian organization that began as an Amalfitan hospital founded in Jerusalem in 1080 to provide care for poor, sick or injured pilgrims to the Holy Land. After the Western Christian conquest of Jerusalem in 1099 during the First Crusade it became a religious/military order under its own charter, and was charged with the care and defence of the Holy Land. Following the loss of the Holy Land by Christian forces, the Order operated from Rhodes, over which it was sovereign, and later from Malta where it administered a vassal state under the Spanish viceroy of Sicily.