Roman amphitheatre of Albano Laziale

[1] Its capacity was at least 15,000[1] and its maximum length 113 m.[2] The amphitheatre stands on a slope: to reinforce the platform on which it was built, a terrace had to be constructed, 6.75 m high and 59.6 m long, running parallel to the amphitheatre's perimeter to the west at an average distance of 23 m.[1] The terrace wall, adorned with fourteen niches positioned 2.1 m above the ground, is built with irregular layers of peperino ashlars and bricks.

This vomitorium, shifted slightly from the major axis of the arena, was largely carved into the solid rock of peperino, to a height of about 2.5 m. The rest was constructed with opus quadratum in the same volcanic stone.

The aforementioned 3-meter-deep channel had a dual purpose: to drain water and to provide access for those arranging the stage equipment, who would then emerge in the center of the arena.

The arena's enclosing wall has been preserved to a maximum height of 2.5 m. However, it is likely, based on some discovered blocks, that it originally extended higher with a curved overhang.

Access was initially through fornix XIII of the first order, measuring 23 m long and 3 m wide, via two double-ramped staircases that led to either side of the platform.

However, this access was later abandoned in favor of the nearby fornix XIV, probably due to the closure of the two staircases, allowing the pulvinar's surface area to triple.

Archaeologist Giuseppe Lugli commented on these structures: "At first sight, the great irregularity that exists among them in shape and size is striking, not explained by particular conditions of the terrain.

Around the circumference of the amphitheatre, at least on the southern side, there was a paved road, which probably then reached the Appian Way, following the current Via dell'Anfiteatro Romano to Piazza Giuseppe Mazzini.