Perhaps the oldest remains are some of the piers -and buttresses of the bridge over the Moselle, which may date from about 28 B.C. The well-preserved amphitheatre just outside the modern town to the south-east was probably built in the reign of Trajan or Hadrian.
In other respects they must have resembled those of Oriental cities - the living apartments all opening towards the interior, and showing only blank walls towards ' It consisted of two parallel stone walls with buttresses, about 55 ft.
The outer faces of the walls are strengthened by square buttresses built out at intervals of 60 yds., and on the summits of these stand the guard-houses for the troops on duty.
The lower part of the trunk bears huge buttresses, each of which ends in a long branching far-spreading; root, from the branches of which spring the peculiar knees which, rise above the level of the water.
From the main pedestal project four buttresses, on which are seated four monolith figures representing Morality, Education, Law, and Freedom.