List of Knights Hospitaller sites

The Knights Hospitaller operated a wide network of properties in the Middle Ages from their successive seats in Jerusalem, Acre, Cyprus, Rhodes and eventually Malta. In the early 14th century, they received many properties and assets previously in the hands of the Knights Templar. 
Middle East.
Kingdom of Jerusalem.
This includes both the Kingdom of Jerusalem and its Vassal entities. 
Western Europe.
References to countries below are using 21st-century borders. 
Tripoli and Malta.
After the Ottoman conquest of Rhodes in 1522, the Knights made stops in Candia, Messina, Bacoli near Naples, and Civitavecchia. Pope Adrian VI provisionally relocated the Order in Viterbo, where they stayed from 1523 to 1527. Then at the invitation of Charles III, Duke of Savoy, they moved to Nice and nearby Villefranche. On in Bologna, Emperor Charles V granted them a new permanent base.
Since 1798.
Following the expulsion of the Order from Malta by Napoleon in 1798, the Order's remnants temporarily relocated in Messina until 1802, Catania until 1826, and Ferrara until 1834. Gotland was offered to the knights by Sweden in 1806, but they refused as they still hoped to reclaim sovereignty over Malta. The Order then settled in its long-held properties in Rome, which were granted extraterritoriality in 1869. In that period it assumed its modern name of Sovereign Military Order of Malta. 
In Protestant countries.
The Order of Saint John (Bailiwick of Brandenburg) ("Johanniter") had become autonomous in 1538, and was dissolved in 1811. Since restoration in 1852 it has had its seat in Berlin until World War II, then Bad Pyrmont until 1952, Rolandseck () until 1962, Bonn until 2001, Berlin-Lichterfelde until 2004, and since 2004 Potsdam as formal seat even though the main office remains in Lichterfelde. Its activities include the Johanniter-Unfall-Hilfe. 
The British Order of Saint John, formed in 1831 and chartered in 1888, manages several facilities in Jerusalem undre the Saint John Eye Hospital Group, as well as the international St John Ambulance network. Its London headquarters, at St John's Gate, Clerkenwell, hosts the Museum of the Order of St John. 
The Order of Saint John in Sweden was founded in 1920 following the disruption of the "Johanniter" in Northern Europe during World War I. Its headquarters is hosted by the House of Nobility in Stockholm. 
The was created in 1946 in a similar development following World War II. It is headquartered at 48 Lange Voorhout in The Hague. 
Johanniter International, a partnership of the four protestant Orders of St. John and their national charities, was founded in 2000 and is headquartered in Brussels.