Moreover, since the Roman walls were admittedly broken down in many places during the siege by Tetricus, in the year 269 A.D.,--an event of which Eumenes was a witness,--and the inhabitants were already beginning to retire within the safer precincts of the Citadel; what would be the reason for erecting elaborate gates on the line of the ruined wall? I am not an authority upon ancient architecture; but I was certainly astonished to read the date given in the "Dictionnaire Raisonné"; and I should be glad to know whether other experts support M. le Duc's theory. Of the two other gates--the Porte St. Andoche, on the south-west, and the Porte de Rome on the south-east, in the direction of Lyons,--nothing remains except the rectangular portion of one of the lateral towers of the former. The loss of the Porte de Rome, or the "Porte des Marbres," as it was popularly called, is especially to be regretted, since that name alone suggests the truth, of which evidence exists, that it was by far the most beautiful of the four. Moreover, it has additional historic interest as being the gate by which Constantine entered Autun in 311. The old writers agree in describing the Porte des Marbres as a thing of beauty,--a quality which was its undoing, as offering an irresistible attraction to the Mediæval and later builders. Several ancient Corinthian capitals, not otherwise easily accounted for, are to be seen to-day in the porch of the cathedral built at the close of the 12th century. It appears, indeed, that around the present site of the Fountain of the Pelican was a burial ground named Les Marbres, on account of its richness in borrowed sculpture. The site of the gate was known from the 14th century onwards as "à Marbres" or "de Marboribus." At the time of the construction of the bastion of the Jambe de Bois, the workmen unearthed many marbles, including columns, capitals, and bases of the Corinthian or some composite order.[34] The date of the final destruction of the Porte des Marbres is uncertain; but its flanking towers, then known as the Fors de Marboribus, were still standing in the middle of the 14th century. Before beginning another chapter, let me speak one word of warning. If you ask one of the humbler inhabitants of Autun where the Porte St. Andoche stood, you will be directed, without hesitation,--as we were,--to the bank of the river, near the railway station. Having reached that spot and crossed the bridge, you will obtain a lovely view of the Roman wall and the river beside it, but will fail to find the remaining tower of the gate, for the reason that it is not there. The Porte St. Andoche stood at the foot of the Boulevard Schneider, opposite to the Couvent du Sacrement, on the road leading, by way of the enceinte, to the Tour des Ursulines.