The glory of the Augustan age was more seen in the magnificent buildings which arose upon the hills, although he gave attention to the completion of many works of utility or beauty in other parts of the city. He restored the Capitoline temple and the theatre of Pompey; repaired aqueducts; finished the Forum and Basilica Julia; and entirely built the Curia Julia. He founded, on the Palatine, the Imperial Palace, afterwards enlarged by his successors until it entirely covered the original city of Romulus. Among the most beautiful of his works was the Temple of Apollo, the columns of which were of African marble, between which were the statues of the fifty Danaids. In the temple was a magnificent statue of Apollo, and around the altar were the images of four oxen--the work of Miron, so beautifully sculptured that they seemed alive. The temple was of the finest marble; its gates were of ivory, finely sculptured. Attached to this temple was a library, where the poets, orators, and philosophers assembled, and recited their productions. The Forum Augusti was another of the noblest monuments of this emperor, in order to provide accommodation for the crowds which overflowed the Forum Romanum. He also built the theatre of Marcellus, capable of holding twenty thousand spectators. [Sidenote: Pantheon.] [Sidenote: Thermae Agrippae.] [Sidenote: Campus Martius.] [Sidenote: Works of the Nobles.] Nor was Augustus alone the patron of the arts. His son-in-law, and prime minister, Agrippa, adorned the city with many noble structures, of which the Pantheon remains to attest his munificence. This temple, the best preserved of all the monuments of ancient splendor, stood in the centre of the Campus Martius, and contained only the images of the deities immediately connected with the Julian race and the early history of Rome. Agrippa was the first to establish those famous baths, which became the most splendid monuments of imperial munificence. The Thermae Agrippae stood at the back of the Pantheon. It was fed by the Aqua Virgo, an aqueduct which Agrippa purposely constructed to furnish water for his baths. Many other architectural monuments marked the public spirit of this enlightened and liberal minister, especially in the quarter of the Circus Flaminius and the Campus Martius. This quarter was like a separate town, more magnificent than any part of the ancient city. It was adorned with temples, porticoes, and theatres, and other buildings devoted to amusement and recreation. It had not many private houses, but these were of remarkable splendor. Other courtiers of Augustus followed his example for the embellishment of the city. Statilius Taurus built the first permanent amphitheatre of stone in the Campus Martius. L. Cornelius Balbur built at his own expense a stone theatre. L. Marcius Philippus rebuilt the temple of Hercules Musarum, and surrounded it with a portico. L. Cornificius built a temple of Diana. Asininius Pollio an