Comitia, maybe? That's plural of comitium. 'Commitia' isn't a Latin word.

A debate is a conversation with two different sides. The Romans many times would debate at dinners or informal gatherings. The main debating area was the forum. Public debates took place at the comitium, an open area in the forum, by the senate house, where, during the Republic, the popular assemblies met to vote on bills and elect officers of state. There was also the rostra, which was a platform for speeches on the north side of the comitium. The assemblies were addressed from the rostra. Candidates for the election of officers of state made their electoral speeches, and senators and private citizens spoke on bills. Appeal trials, which were decided on by the assemblies were also conducted from the rostra. This continued after these hearings were transferred from the assemblies to special jury courts. When the voting population became too big for the comitium, the site of the assemblies and the debates was moved to the opposite end of the forum by the Temple of the Castor. The senate also held its own debate in the senate house (curia).

The Roman rostra has not has much on an influence on later architecture because it was just a large platform for speeches. It is not even sure what it actually looked like. The rostra was on the south side of the comitium, the place where the popular assemblies met to vote. Speakers addressed the crowds from the rostra and faced the north side of the comitium and the senate house. Its name came from the six prows with ramming points of warships (rostra (plural of rostrum) which were captured in a naval victory in 338 BC and which were used for the platform. In the imperial age it came to be called Rostra Vetera ("Elder Rostra") to distinguish it from other later platforms which were built for similar purposes.

It also had to be noted that although Roman architecture influenced European architecture until before Ward War II, it no longer has much of an influence on contemporary architecture.

Ancus Maricias built the mamertine prison

According to Roman tradition, the Mamertine Prison (known in Roman times as the "Tullianum") was built by the legendary 4th King of Rome, Ancus Marcius, ca. 640-616 BC.

Saint Peter, according to the Catholic faithful. Most historians however have found little or no solid evidence that Peter ever actually was in Rome; let alone, how he met his end there