Beaufort or Belfort (Shaqif Arnun or Qala'at al-Shaqif in Arabic) is a Crusader fortress in Nabatieh Governorate, Southern Lebanon, about to the south-south-east of the village of Arnoun. There was a fortification on the site before it was captured by Fulk, King of Jerusalem, in 1139 and construction of the Crusader castle probably began soon after. Saladin captured Beaufort in 1190, but 60 years later Crusaders re-took it. In 1268 Sultan Baibars captured the castle.