Béarn (; Gascon: Bearn or Biarn; ) is one of the traditional provinces of France, located in the Pyrenees mountains and in the plain at their feet, in southwest France. Along with the three Basque provinces of Soule, Lower Navarre, and Labourd, the principality of Bidache, as well as small parts of Gascony, it forms in the southwest the current département of Pyrénées-Atlantiques (64). The capitals of Béarn were Beneharnum (until 841), Morlaàs (from ca. 1100), Orthez (from the second half of the 13th century), then Pau (beginning in the mid-15th century).