The Basilica replaced the Forum in adverse weather conditions: it was therefore an indoor Forum. Its structure is very similar to that of a Greek temple. It is preceded by a portico. Five steps allow access to the actual basilica with a facade characterized by four columns of the Ionic order that were about eleven meters high. Inside, it is divided into three naves, with two rows of columns with Ionic capitals. The central nave was surrounded by twenty-eight columns. The podium located along the western side, about two meters high, was accessed by a wooden staircase. The place, reserved for magistrates, could only be reached by a mobile wooden staircase, to prevent them from being attacked by defendants.