How tens of thousands moved in and out
The seating followed the ranks of the time. The emperor and the Vestal Virgins each had boxes at the north and south ends; senators sat on the same wide platform and could bring their own chairs; knights took the next level up, and commoners were split into two bands by means. Domitian added a wooden gallery on top for the poorest, slaves and women to stand.
Entry worked by number. Around the ground level opened eighty gates, seventy-six for ordinary spectators, with both gates and stairs numbered; in hand was a pottery token marked with a number, guiding you to your section and row. Passages opened below or behind the seating, and at dispersal the crowd could empty in minutes. The four axial gates carried stucco reliefs, the north one reserved for the emperor.
Seats too were numbered — which tier, which wedge-shaped block, which row — all readable from a single token. Names carved by senators in the 5th century still survive on the stone, perhaps reserving their own places. Some trades were flatly barred: gravediggers, actors and retired gladiators among them.