At the back of the ruins of the temple are the remains of the Basilica Opimia. Part of the ground-plan is shown on a fragment of the marble map of Rome, with a fragment of a basilica behind. On examination of the ruins, the two buildings can be distinctly made out.
In front are the ruins of the steps and portico, with the cella behind. There seems to have been at the back of the cella an entrance into the basilica, both being closed with independent doors. The marble threshold of the temple is in situ, and upon it is cut a caduceus, the emblem of Concord, which was once filled in with bronze; parallel to this, but distinct, is the marble threshold of the basilica, with the holes where the pivots of the doors turned. Under the podium of the basilica is a long narrow vault of opus incertum, but it does not lead into the Tabularium, that being built long afterwards, A.U.C. 675, as the old inscription records, B.C. 78. It was probably the place where the utensils for the temple were deposited. Some of the marble decorations of the basilica still remain; and this was no doubt the hall used when the Senate are spoken of as having sat in the Temple of Concord. "The Senate assembled in the building near the Temple of Concord" (Dion Cassius, lviii. 2). "In this temple, in which, whilst I was advising the Senate, you placed around it armed men" (Cicero, "2 Phil." vii. and viii.). "Here, in this Cella of Concord, on the slope of the Capitol."
It may be that this is the basilica spoken of in later times as the Basilica Argentaria, probably taking that name from being frequented by the silversmiths. It was restored, after a fire, by Septimius Severus, and the inscription quoted is probably of his date. In A.D. 731–741, Pope Gregory III. turned the remains into a Christian church, which exists no longer. In 1817, three inscriptions were found here, referring to the temple and basilica. Cicero ("Per Sest." lxvii.) tell us "that the monuments of L. Opimius in the Forum were very much frequented."
A Temple of Concord seems to have been decorated with many statues, but there is nothing to show whether it was that of Camillus on the Capitol, or Opimius's.
"Piston also made the statues of Mars and Mercury, which are in the Temple of Concord at Rome." "Sthenius made the statues of Ceres, Jupiter, and Minerva, which are now in the Temple of Concord." "Augustus consecrated in the Temple of Concord, as something marvellous, four figures of elephants made of obsidian stone." "Also, a picture of Marsyas bound by Leuxis" (Pliny, xxxiv. 19, xxxv. 36, xxxvi. 67).
"Vitellius left the palace to lay down the ensigns of sovereignty in the Temple of Concord" (Tacitus, "H." iii. 68).
To the left is
THE TEMPLE OF VESPASIAN.
Vespasian having rendered such services by restoring the Capitol, and collecting the records in the Tabularium, no more suitable site could be found for the erection of a temple to the deified emperor than in front of an old entrance to this latter building. The three pillars, which are all that remain of the building, stand upon a lofty terrace; and the skill of the architect in concealing the limited depth of the space allotted to the temple is shown in his having placed the columns of the flank nearer to each other than those of the front.
The beauty of this ruin excites universal admiration. It approaches that of the Temple of Castor and Pollux in the Forum. The inscription on the architrave, copied, whilst still entire, by a monk of the monastery of Einsiedeln, in the eighth century, refers to the restoration of the building by Septimius Severus and Caracalla, who appear to have also restored other sanctuaries in the same neighbourhood.