Suetonius ("Caligula," xxxi.) says, "He began an amphitheatre near the septa or barracks of the soldiers." Dion Cassius records, "That on one occasion, when the Emperor Caligula was in want of criminals for combats, he seized a number of citizens, and after tearing out their tongues that they might not complain, he had them brought into the arena, where they were compelled to fight." _Adjoining is the_ CHURCH OF S. CROCE IN GERUSALEMME, erected by S. Helena. The interior has three aisles divided by pilasters, and with eight columns of Egyptian granite. The high altar is adorned by four columns of breccia-corallina, which support the canopy. Under the altar is an ancient urn, which contains the bodies of the holy martyrs Anastasio and Cesario. The frescoes of the vault of the tribune are by Pinturicchio. The subterranean chapel of S. Helena is decorated with paintings by Pomarancio, and with mosaics by B. Peruzzi. Ladies are not allowed to enter this chapel, except on the saint's day. The church was erected in THE SESSORIUM PALACE, which was built by Sextus Varius, father of Elagabalus. This was afterwards turned into the Palace of Helena, near which were her baths, remains of which exist in the adjoining vineyards; also of the reservoir; which remains are called by some the TEMPLE OF VENUS AND CUPID, from a statue found there. A Venus with Cupid at her feet, supposed to be the likeness of Salustia Barbia Orbiana, the wife of Alexander Severus, from an inscription on the pedestal saying that it was dedicated to Venus by one Salustia. In the "Excerpta Valesiana de Odac" (lxix.) it is mentioned as "the palace called Sessorium." In the buildings at the _back_ of the church remains of a large palace can be traced. It is said by tradition that it took its name from a basilica which stood here where the cases of the slaves were tried. Another is, that here was the Prætorium or headquarters of the Prætorian prefect of the city. "It is said that Maximin, the prefect, had a small cord always suspended from a remote window of the Prætorium, the end of which had a loop which was easily drawn tight, by means of which he received secret information" (Marcellinus, xxviii. 7). The ruin to the left of the church has all the appearance of a basilica. _Returning past the Lateran, a lane by the side of Mr. Warrington Wood's, via_ S. STEFANO ROTONDO, following the aqueduct, leads to the remarkable CHURCH OF S. STEFANO ROTONDO, supposed to be formed from the remains of NERO'S MEAT-MARKET. A coin representing this market agrees with the architecture of the church. "Then Nero celebrated a feast by way of thanksgiving for his preservation, and dedicated the market-place where meat is sold" (Dion Cassius).