monastery, ‘exceptis scriptoribus, nulla habebatur.’[1299] Even the books were assigned only to the younger brethren: ‘maiores orationi vacabant’. In his theory of education Augustine allows pictures and statues and such-like to be used for instruction. But, except for strictly scientific purposes, they must be looked on as otiose: ‘hoc totum genus inter superflua hominum instituta numerandum est, nisi cum interest quid eorum, qua de causa, et ubi et quando et cuius auctoritate fiat.’ Cassiodorus expresses the view of the more liberal and enlightened Christian teachers when he sees that art may be used to improve the works of the ancients by avoiding their mistakes, to clothe the new in the glory of the old.[1300] Similarly in Paulinus of Nola we find the motto of ‘Spoiling the Egyptians’ in regard to art, and the note of ‘Soli Deo gloria’. To art conceived in this way he has no objection; rather, he seeks it out with enthusiastic eagerness. ‘Videamus autem aedificantes quid de nostra fragili terrenaque substantia dignum divino fundamento superaedificare possimus, ut ipso principali lapide unificati lapides in fabricam templi caelestis optemur.’[1301] Thus, while there was much in the conception of Christianity at the time which made for a philistinism in art, there were also encouraging elements. In the catacombs, too, we find traces of other artistic developments. Ignorant and untrained as those early Christians were, they had within them a strong emotion based on sincere conviction, and this emotion found an outlet in verse and painting, sculpture and mosaic, which, though often of the most rudimentary order, represented the beginnings of new artistic movements. A glass patera found at Cologne has gold figures on a white background, representing the vision of Ezekiel, and it belongs to the first few centuries of our era.[1302] Gilt glasses, frequently produced at Cologne, and decorated with the heads of Christ and the apostles, have come down to us from the early Christian centuries. There are also finely wrought and figured lamps and linens. But most striking are the ivories, of which a large number is now in the British museums. They are extremely beautiful and belong to a school of the fourth and fifth centuries. Pilate washing his hands, Peter’s denial, Judas hanging himself, Christ bearing the Cross—such are the themes portrayed on them, possibly by Eastern carvers.[1303] At Arles there is a large collection of paintings which show that the passage of the Red Sea was a favourite subject. And Paulinus of Nola, in his long letter to Severus,[1304] shows clearly that it was a common thing to have paintings in the churches. He describes the prominent picture of Martin, ‘qui etiam in splendoribus sanctorum conspicua claritate praefulget’, and mentions another of himself on an adjoining wall. Numerous verses are addressed to Severus on the subjects of his pictures, and his skill is praised as worthy of his themes: