Aragon (ăr' ȧ-gŏn), an ancient Spanish kingdom, now a district of Spain, embracing the provinces of Huesca, Teruel and Zaragoza (Saragossa), and through which the Ebro and Jalen Rivers flow. It embraces an area of 18,294 square miles, and has a population under a million. It is mountainous, skirted by the Sierras and the highest range of the Pyrenees. Of its many products, the grape and the olive are the finest. Aragon was conquered by the Romans, by the Goths and lastly by the Moors in 714. Later it was governed by its own kings till it became, in 1479, a part of Castile and Leon, by the marriage, in 1469, of Ferdinand and Isabella.