ARCOS DE LA FRONTERA, a town in Spain, province of Cadiz; on the right bank of the river Guadalete. Pop. (1930) It occupies a ridge of sandstone, washed on three sides by the river, and commanding fine views of the lofty peak of San Cristobal on the east and the fertile Guadalete valley celebrated in ancient Spanish ballads for its horses. From the highest point a Gothic church with a fine gateway and a modern tower overlooks the town. The fame of its ten bells dates from the wars between Spaniards and Muslims in which "Arcos of the Frontier" received its name. The town was captured in 1250 by Ferdinand III. of Castile and Leon.