Visigothic—Merovingian—Lombardic—Extinction of classic art—Splendid reign of Dagobert—St. Eloy of Noyon—The Library of Laon—Natural History of Isidore of Seville—Elements of contemporary art—Details of ornament—Symbolism—Luxeuil and Monte Cassino—Sacramentary of Gellone—“Prudentius”—“Orosius”—Value of the Sacramentary of Gellone