Art in Gaul, as at Rome, was largely produced by foreigners. The great statue of Mercury of Auvergne, the only Gallic piece of sculpture we know, was executed by the Greek Zenodorus, who sold his work for 400,000 sesterces, and was then called to Rome to make a statue of Nero. Of the statues found at Martres, near Toulouse, the oldest belonged to the first century, the more recent to the third and fourth. Why is it that so many were found in the same place? Lavisse thinks that the Christians, in the height of their anti-pagan fury, collected, mutilated, and threw them together in some out-of-the-way spot. Now it is commonly held, as we have seen,[1294] that the sort of marble of which they were made is the same as that of the neighbouring quarries, especially that of Saint-Béat on the Upper Garonne. It is therefore probable that they were produced in the neighbourhood, and the thought is suggested that perhaps, for all we know, they may represent some school of sculptors which flourished during our period. Of Gallic sculpture and its relation to Greek art, the influence of Alexandria, the centre of Hellenistic art in the first century, the industrial art of Gaul and its relation to Greece, a sound and recent summary will be found in Lavisse.[1295] The splendour of public buildings both at Trèves and at Autun is often expatiated on by the panegyrists.[1296] The descriptions show considerable interest in architecture, and this interest when presented externally in a building like the Maeniana must have had an educative value for those who attended the institution. But it was Christianity that accomplished most in this field. When Christian art began to develop it took for its first church model the basilica which was already seen in the chapels of the catacombs. We hear of bishops of Gaul who got workmen to come over from Italy in order to build churches after this style. The basilicas of Constantine and Theodosius, the sepulchral bas-reliefs at Rome, Ravenna, and Arles, and at many other places, are well known. ‘Before the fall of the Empire’, says Ozanam, ‘there was to be seen that Romanesque and Byzantine architecture which was soon to cover with monuments the shores of the Loire, Seine and Rhine, and which, from the broken arch of its vault, was to produce all the beauties of the pointed Gothic.’[1297] That the interest which Sidonius and his friends showed (though superficially) in architecture did not die with them is proved by the letter of Cassiodorus (at the beginning of the sixth century) to the prefect of Rome.[1298] He is anxious to have a competent man in charge of the public architecture. ‘Romanae fabricae decus convenit peritum habere custodem’, who must be an expert and a student: ‘Det operam libris antiquorum, instructionibus vacet.’ There were within the church a large number of narrow and uneducated zealots, who, like Martin of Tours, banished all art. ‘Ars ibi’, says Sulpicius Severus of Martin’s