a town of the Abruzzi, Italy, in the province of Aquila, 73 m. E. of Rome by rail. Pop. (1901) 9725. It is finely situated on a hill above the Lago Fucino, and is dominated by a square castle, with round towers at the angles, erected in its present form in 1450. It contains three churches with 13th century facades in the style of those of Aquila. The origin of the town goes back to Lombard times. A count of Celano is first mentioned in 1178. It was the birthplace of Thomas of Celano, the author of the Dies Irae.