Arabian architecture, 401. The Escurial, 404. The remains in Toledo, 405. — Cordova, 406. — Art periods in Spain, 407. Arabian art distinct, 408. Schools of Saracenic architecture, 408. Principal features of Arabian architecture, 410. The horse-shoe arch, 410. A living geometry, 411. -the Mezquita of Cordon, 412. Begun by Abdu-r-rahman I., 413. Pro portions and details, 414. — A forest of columns, 415. — The mihrab, 415. Arches, 417. Alterations in the days of Charles V 418. The Moor not the only thief of antiquity, 419. — Unjust criticisms, 420.