The comitium was in the time of the Roman Republic the customary place for the legislative assembly (comitia). It lay on the edge of the Roman Forum, next to the Curia Julia, in which the Senate typically worked. This article is becoming very long. ... The Roman Republic (Latin: Res Publica Romanorum) vested formal governmental powers in four separate peoples assemblies — the Comitia Curiata, the Comitia Centuriata, the Comitia Tributa, and the Concilium Plebis. ... This page refers to the main forum in the centre of Rome. ... The Curia, inside the Forum The Curia Hostilia (Latin, Hostilian Court) was the favorite meeting place of the Roman Senate in the Forum Romanum at the foot of the Capitoline Hill, near the well of the Comitia. ... The Roman Senate (Latin: Senatus) was the main governing council of both the Roman Republic, which started in 510 BC, and the Roman Empire, which ended in the 6th century AD. The word Senatus is derived from the Latin word senex, meaning old man or elder. ...

The appearance of the Comitium changed considerably at various times. Originally it was an open square, but later it had a rounded shape, like an amphitheater. At the edge of the Comitium was the Rostra, from which speakers made speeches. As the population grew and not all Romans could fit in the Comitium, speakers in the later Republic spoke from the Rostra to the Forum in general. Because of reconfigurations, little of the Comitium can be seen today. The name amphitheatre (alternatively amphitheater) is given to a public building of the Classical period (being particularly associated with ancient Rome) which was used for spectator sports, games and displays. ... The base of the column dedicated in 303, during the visit of emperor Diocletian in Rome, in occasion of the ten years of the institution of the Tetrarchy. ...

The comitium is located at 41°53′33.99″N, 12°29′6.15″E.