Lescar is a commune in the Pyrénées-Atlantiques department and Nouvelle-Aquitaine region of south-western France. Lescar is the sit…Lescar is a commune in the Pyrénées-Atlantiques department and Nouvelle-Aquitaine region of south-western France. Lescar is the site of the Roman city known variously as Benearnum, Beneharnum or Civitas Benarnensium, the location providing the name for the later region of Béarn.