remains offer no confirmation. The temple itself also stood within a spacious precinct surrounded by a colonnade, parts of which were uncovered by Rodolfo Lanciani in his early excavations of the surrounding spaces. Architecture Remains Long ago both ends of the temple, as well as the other side, disappeared; all that remains are eleven fluted columns with Corinthian bases and capitals, as well as one side of the cella wall which was built into a nineteenth century palazzo that continues to house the Rome Borsa. While the lower part of the original richly carved entablature survives, the rest was recorded in sixteenth-century drawings. In modern times, the entablature was largely repaired in stucco with the cornice so poorly restored that three different versions exist with only the central one resembling the original. Traces of vaulting beneath the front steps also demonstrate that the temple originally faced East (towards the Corso) and likely had eight columns across the front, with thirteen down either side of the structure. These traces also consist of surviving remains of clamps which suggest pilasters were joined to the colonnade. Excavations Excavations began in 1878 and recent explorations in the cellars of the buildings on other sides of Piazza di Pietra identified line of a monumental enclosure wall, with large curving exedra at the back. The front of colonnade behind the railing was also thoroughly excavated which exposed original ground level of temple precinct, 5 m below present square and flank of high podium faced with white marble to match columns above. Building materials Proconnesian marble is employed distinctively with grey and white horizontal bands for the Corinthian order columns measuring 1.44 m in diameter and 14.8 m high. This marble type came from northwestern Turkey and does not really appear in Rome until the end of Hadrian's reign, and is widely employed by the Severans. Peperino tufa (podium faced with matching white marble) was used for the cella wall that features behind the colonnade. Blocks of peperino were left rough, presumably to be covered with marble revetment. Some of the fluted columns of the surrounding colonnade were also of giallo antico, a coloured marble also known as Numidian yellow from Tunisia that was used for columns, paving and veneer. Construction techniques The interior of the squarish cella was lined with engaged order and had a coffered concrete barrel vault ceiling with clear settings for a lining