An episcopal city and the capital of an administrative district formerly included in the province of Beira, Portugal; 1560 ft. above the sea, on the Abrantes-Guarda railway. Pop. (Igloo) 7288. Numerous Roman remains bear witness to the antiquity of Castello Branco, but its original name is unknown. The city is dominated by a ruined castle, and partly enclosed by ancient walls; its chief buildings are the cathedral and episcopal palace. Cloth is manufactured, and there is a flourishing local trade in cork, wine and olive oil. The administrative district of Castello Branco, which comprises the valleys of the Zezere, Ocreza and Ponsul, right-hand tributaries of the Tagus, coincides with the south-eastern part of Beira; pop. (1900) 216,608; area, 2582 sq. m.