Trajan stripped the palace of his predecessors of all its ornaments to adorn the temple of Jupiter Capitolinus,[151] but it was restored by Commodus, after a fire which occurred in his reign,[152] and enriched by Heliogabalus,[153] and almost every succeeding emperor, till the time of Theodoric.[154]
"'Brickwork I found thee, and marble I left thee!' their Emperor vaunted; 'Marble I thought thee, and brickwork I find thee!' the Tourist may answer."
S. Gregorio--S. Giovanni e Paolo--Arch of Dolabella--S. Tommaso in Formis--Villa Mattei--Sta. Maria della Navicella--S. Stefano Rotondo--I Santi Quattro Incoronati--S. Clemente.
The Coelian Hill extends from St. John Lateran to the Vigna of the Porta Capena, and from the Fountain of Egeria to the Convent of S. Gregorio. It is now entirely uninhabited, except by monks of the Camaldolese, Passionist, and Redemptorist Orders, and by the Augustinian Nuns of the Incoronati.
In the earliest times the name of this hill was Mons Querquetulanus, "The Hill of Oaks," and it was clothed with forest, part of which long remained as the sacred wood of the Camenæ. It first received its name of Coelius from Coelius Vibenna, an Etruscan Lucumo of Ardea, who is said to have come to the assistance of Romulus in his war against the Sabine king Tatius, and to have afterwards established himself here. In the reign of Tullus Hostilius the Coelian assumed some importance, as that king fixed his residence here, and transported hither the Latin population of Alba.
As the Coelian had a less prominent share in the history of Rome than any of the other hills, it preserves scarcely any historical monuments of pagan times. All those which existed under the republic were destroyed by a great fire which ravaged this hill in the reign of Tiberius,[155] except the Temple of the Nymphs, which once stood in the grove of the Camenæ, and which had been already burnt by Clodius, in order to destroy the records of his falsehoods and debts which it contained.[156] Some small remains in the garden of the Passionist convent are attributed to the temple which Agrippina raised to her husband the Emperor Claudius, and in S. Stefano Rotondo some antiquaries recognize the Macellum of Nero. There are no remains of the palace of the Emperor Tetricus, who lived here, "between the two sacred groves,"[157] in a magnificent captivity under Aurelian, whom he received here at a banquet, at which he exhibited an allegorical picture representing his reception of the empire of Gaul, and his subsequent resignation of it for the simple insignia of a Roman senator.[158]