a small city of Spain, in the province of Aragon. It is situated on the river Xalon, a little below its junction with the Xiloca, in a fertile valley, which produces abundantly olives, grasses, and melons. The ruins of the ancient city of Bibilis, the native place of the poet Martial, are to be seen near Calatayud. This city contains 1500 houses and 9000 inhabitants, three tanneries, and twelve soap-boiling houses. There is annually raised here 20,000 hundredweight of hemp.