Hall of the Crusader Knights, Museum in Old City, Acre, Israel

The Hall of the Crusader Knights is the publicly accessible part of the Hospitaller compound in Acre, a vaulted complex of halls built in the 12th and 13th centuries and lying largely beneath today's street level. Its eastern wing holds the Grand Manoir, a hall of about 40 by 35 metres with fifteen columns in three rows, and the south wing the Gothic refectory, whose ceiling rests on three very wide piers.

The Hospitaller Knights built this fortress in the 12th century as their administrative center during the Crusader period. After Mamluks captured the city in 1291, the structure was modified and later used by different powers that controlled Acre.

The halls take their name from the Knights Hospitaller, whose compound this was; the refectory displays locally found pottery, including a glazed sherd painted with olive-green Hospitaller crosses in the straight-lined 12th-century style. Artisans' stalls in the complex sell crafts made on site.

Visitors enter through the eastern Ottoman courtyard at Rechov Weizmann 1, where the ticket office is located. The halls lie seven to eight metres below the present street level, so the route involves stairs and uneven medieval surfaces. Some excavated parts of the Hospitaller compound remain closed to the public.

The refectory's rib bases are carved, and beneath it a tunnel leads south to a crypt, the remains of a Gothic church and a Turkish hammam at Crusader street level, mostly still unexcavated. Excavators also found bowl fragments bearing olive-green Hospitaller crosses in the straight 12th-century style.