[Illustration: INTERIOR VIEW OF THE ULPIAN BASILICA (RESTORATION)
Built by the Emperor Trajan in connection with his Forum at Rome.]
AQUEDUCTS
Perhaps the most imposing, and certainly among the most useful, of Roman structures were aqueducts. [36] There were sixty-eight in Italy and the provinces. No less than fourteen supplied the capital city with water. The aqueducts usually ran under the surface of the ground, as do our water pipes. They were carried on arches only across depressions and valleys. The Claudian aqueduct ran for thirty-six miles underground and for nine and a half miles on arches. Though these monuments were intended simply as engineering works, their heavy masses of rough masonry produce an inspiring sense of power.
[Illustration: A ROMAN AQUEDUCT The Pont du Gard near Nîmes (ancient Nemausus) in southern France. Built by the emperor Antoninus Pius. The bridge spans two hilltops nearly a thousand feet apart. It carries an aqueduct with three tiers of massive stone arches at a height of 160 feet above the stream. This is the finest and best preserved aqueduct in existence.]
THERMAE
The abundant water supply furnished by the aqueducts was connected with a system of great public baths, or thermae. [37] Scarcely a town or village throughout the empire lacked one or more such buildings. Those at Rome were constructed on a scale of magnificence of which we can form but a slight conception from the ruins now in existence. In addition to many elaborate arrangements for the bathers, the thermae included lounging and reading rooms, libraries, gymnasia, and even museums and galleries of art. The baths, indeed, were splendid clubhouses, open at little or no expense to every citizen of the metropolis.
[Illustration: THE COLOSSEUM]
TRIUMPHAL ARCHES AND COLUMNS
A very characteristic example of Roman building is found in the triumphal arches. [38] Their sides were adorned with bas-reliefs, which pictured the principal scenes of a successful campaign. Memorial structures, called columns of victory, [39] were also set up in Rome and other cities. Both arch and column have been frequently imitated by modern architects.
[Illustration: A ROMAN CAMEO
Portrait of a youth cut in sardonyx. Probably of the first century A.D.]