An interesting city of Spain, and capital of Aragon, on the Ebro, which flows through it, 212 m. NE. of Madrid; its history goes back to far Roman times, and includes fierce struggles between Goths, Moors, and Spaniards, and a memorable siege by the French in 1808; being one of the earliest Christian cities of Spain it contains many interesting relics, cathedrals, &c.; there is a university, citadel, archiepiscopal palace, &c.; manufactures embrace cloth, silks, leather, &c.