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.
The eponymous hospital, in the Christian Quarter of Jerusalem's neighborhood now known as Muristan just south of the Church of the Holy Sepulchre, including the Church of Saint John the Baptist, 1099–1187. The Templars also held the Church of Saint Mary of the Germans for a brief period until 1244.
The Hospitaller commandery of Saint-Jean-d'Acre, ca. 1130–1187 and 1191–1291; the Hospitallers administered the whole city of Acre from 1229 to its fall in 1291.
Bayt Jibrin (Beth Gibelin) northwest of Hebron, 1136–1187
the Benedictine monastery in Abu Ghosh near Jerusalem, built by the Hospitallers in 1140
Belmont Castle by Suba near Jerusalem, 1160s–1187
Aqua Bella (Arabic Khirbat Iqbalā), now Ein Hemed west of Jerusalem
Arsur (Arabic Arsuf, ancient Apollonia) on the coast south of Netanya, 1261–1268
Qalansawe (Calanson) inland from Netanya, 1128–1187 and 1191–1265
Burgata north of Qalansawe, 1248–1265
Tel Dothan (Castellum Beleismum or Chateau Saint-Job) southwest of Jenin, in 1187
Qula, northeast of Ramla, in the 12th century
Cafarlet, now Kafr Lam south of Haifa, 1232–1255
Tel Yokneam (Caymont or Cain Mons) southeast of Haifa, 1256–1262
Tel Afek (Recordane) east of Haifa, 1154–1291
Taibe (Le Forbelet) in the Valley of Megiddo, until 1187
Mount Tabor fortress, 1255–1263
Belvoir Castle (Arabic Kawkab al-Hawa) near the Sea of Galilee, 1168–1189
Banias (ancient Caesarea Philippi) near Mount Hermon, briefly around 1157
Hunin (Castellum Novum or Chastel Neuf) at the Northern tip of Israel, also around 1157
County of Tripoli
The Krak des Chevaliers (Hisn al-Akrad), the Hospitallers' major fortress in the Levant, 1142–1271
Margat (Marqab) on the Syrian coast south of Latakia, the Knights' other major redoubt, 1186–1285
Coliath or La Colée (Qalaat al-Qlaiaat), near the coast north of Tripoli
Gibelacar (Hisn Ibn Akkar) in Northern Lebanon, 1170–1203
Chastel Rouge (Qal’at Yahmur) on the coast just north of the Lebanese-Syrian border, ca. 1177–1289
Arab al-Mulk (Belda or Beaude, in Arabic also Balda al-Milk or Beldeh) near Margat, 1160s–1271
Qurfays (Corveis) also near Margat, until 1271
Armenian Kingdom of Cilicia
Silifke Castle (Le Selef, ancient Seleucia) in modern Turkey, 1210–1226
Tokmar Castle near Silifke, also from 1210
Aegean Sea Region
the Hospital of Sampson in Constantinople, which the Hospitallers managed under the Latin Empire's rule until 1261
The Hospitallers also operated hospitals in Negroponte and Corinth
Kolossi Castle near Limassol in Cyprus, 1210–1570 with an interruption in 1306–1313. Limassol was the main seat of the Order between the fall of Acre in 1291 and the move to Rhodes in 1310
Gastria Castle in Cyprus, from 1308
Islands of the Dodecanese:
Kastellorizo, 1306–1440
Rhodes, 1306–1522 (the city of Rhodes 1310–1522)
Tilos, 1309–1470
Symi, 1309–1522
Nisyros, 1315–1522
Kos, 1337–1523
Kalymnos, 1310–1522
Leros, 1309–1522
Smyrna, in whose conquest the Hospitallers took part and 1344 and whose defense they assumed 1374–1402
The Principality of Achaea by lease from Joanna I of Naples, 1376–1381
Corinth, 1397–1404
Bodrum Castle, 1402–1523
Western Europe
References to countries below are using 21st-century borders.
France
Grand prieuré de Saint-Gilles in Saint-Gilles, Gard, 1109–1792
Priory of Saint John in Paris (before 1130 - early 1790s)
Hospital of the Holy Ghost, Montpellier, est. 1145
Château de Condat, Dordogne, since the 12th century
Hospice of Saint John, Nice
Fort Saint-Jean (Marseille), initially built by the Hospitallers in the late 12th century
Maison du Temple in Paris (on the location of the Square du Temple, transferred from the Knights Templar in 1313 and held until 1790
Grand prieuré de Toulouse, 1317–1789
Prieuré hospitalier d’Arles, 1562–1792
Maison des chevaliers de Saint-Jean in Colmar, initially built in 1608
Italy
Hospital of the Holy Sepulchre and Saint John, Pisa, est. 1113
Ospedaletto in Verona, from 1154
Ospedale dei Pellegrini, Asti, from 1182
Hospital of San Sepolcro at the Ponte Vecchio, Florence, 1213–1808
Abbey of Santissima Trinità, Venosa, after 1297
Casa dei Cavalieri di Rodi in Rome, built in the late 13th century
Hospital of San Giovanni a Maruggio, Brindisi, from 1300
San Giovanni di Malta, Venice, transferred from the Templars in 1312
Church of San Giovannino dei Cavalieri in Florence
Ospedale dei Pellegrini, Naples, since 1564
Ricetta di Malta, Augusta, Sicily, 17th–18th centuries
Iberian Peninsula
Castle of La Muela, Spain, since 1183
Royal Monastery of Santa María de Sigena, 1183–1936
Igreja de Santa Luzia (Lisbon), still owned by the Order
Germany, Switzerland, Austria, Poland
Mailberg Castle, Austria, since 1146
Münchenbuchsee Commandery, Switzerland, since 1180
Church of Saint John of Jerusalem outside the walls in Poznań, Poland, since 1187
Ritterhaus Bubikon near Rapperswil, Switzerland, since the 1190s
Thunstetten Commandery, Switzerland, since the early 13th century
Maltese Church, Vienna, since 1217
the Principality of Heitersheim in the Breisgau, 1262–1806, Imperial Estate from 1548
Compesières Commandry near Geneva, Switzerland, since 1270
Sonnenburg, now Słońsk in Poland, 1426–1945
Ordenspalais in Berlin, 1738–1811
Kastl Abbey, 1773–1803
Biburg Abbey, 1781–1808
Former Jesuit college and Church of Saint George in Amberg, Bavaria (1782–1808)
Great Britain and Ireland
Scotland
Torphichen Preceptory, Scotland, since the 1140s
England
St John's Jerusalem, Sutton-at-Hone, England, est. 1199
Clerkenwell Priory in London, the Order's seat in England
Knights Hospitaller Gallery, Quenington, England
West Peckham Preceptory, England, since the early 15th century
Ireland
Kilmainham Priory & Commandery, Dublin - the Order's former seat in Ireland was demolished and sited within the Royal Hospital Kilmainham campus
Kilmainhamwood Preceptory, Co. Meath (named after the Priory)
Kilmainhambeg Preceptory, Co. Meath (named after the Priory)
Hospital Church in "Any" Hospital, County Limerick
Church of St. John the Baptist, Johnstown, Co. Kildare
Preceptories of Kilbegs, Kilheel and Tully, Co. Kildare
Preceptory of Mourne, Co. Cork
Preceptory of Kinelekin, Co. Galway
Preceptory of Kilbarry, Co. Waterford
Preceptory of St. John the Baptist in the Ards (founded by Hugh de Lacy)
Preceptory of St. John & St. Brigid, Wexford (founded by William Marshall, Earl of Pembroke)
Preceptory of Ballyheuk, Co. Wexford
Johnstown, also known as Coorthafooka, Co. Kilkenny
former Frankhouses and Liber Hospes in many towns in Ireland e.g. Mullingar and Fore, Co. Westmeath (sites not determined)
N.B. Other properties formerly of the Knights Templar came into the possession of the Knights Hospitaller after 1310.
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 24 July 1530 in Bologna, Emperor Charles V granted them a new permanent base.
Tripoli, 1530–1551, where the Hospitallers' church stood on the same location as the Sidi Darghut Mosque
Malta and Gozo, 1530–1798
Other locations
Banate of Severin, 1247–1260
Saint Barthélemy, Saint Kitts, Saint Croix and Northern Saint Martin, 1651–1665 during the Hospitaller colonization of the Americas
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.
Villa del Priorato di Malta, Rome, Templar property transferred in 1312, with the Santa Maria del Priorato Church
Palazzo Malta, Rome, acquired in 1630
Church of Saint Elizabeth of Hungary, Paris, since 1938
Casa dei Cavalieri di Rodi, Rome, since 1946
Villa Pagana in Rapallo, since 1959
Saint John's Cavalier, part of the Fortifications of Valletta, leased since 1967 by the Order as its embassy in Malta
Villa Malta (Cologne), since 1971
Fort St. Angelo, Birgu, Malta (upper part), since 2001
See also the list of diplomatic missions of the 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 (Haus Sölling) 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 under 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 Order of Saint John in the Netherlands 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.