The Tabularium was the State Archive, its name indicates the place where the tabulae, the laws issued by the city, were kept. The building in blocks of tuff and peperino extended for 73.60 m against the Capitoline Hill. The entrance was on the side of the Forum, and was then closed by the construction of the temple dedicated to Vespasian and Titus. The staircase that gave access to the upper floor is still preserved. The building had a high podium dominated by a series of arches with Doric semi-columns and a Doric frieze, preserved only in part, with metopes and triglyphs. A portico decorated with Corinthian columns (the remains of which are preserved in the archaeological area below) is assumed to be on the upper floor, housing the archive. The building was built by Q. Lutetius Catulus in 78 B.C. In the SW corner the building shows a recess, necessary to preserve the temple of the god Vedove dating back to 192 BC. The building, as often happens in Rome, has been partly preserved thanks to its transformation into Palazzo Senatorio. This building, seat of the city council from the twelfth century, was finally redesigned by Michelangelo in the sixteenth century to the current behaviour.