Abstract: An event structure is disclosed. The event structure includes a structural perimeter supported by an underlying ground surface and a plurality of structural zones that are connected to one or more of the underlying ground surface and the structural perimeter. A first structural zone of the plurality of structural zones is a main floor of the event structure. Two or more second structural zones of the plurality of structural zones are two or more spectator areas of the event structure that are arranged at an elevated vertical distance with respect to the main floor. At least one spectator area of the two or more spectator areas includes one or more levels. At least one level of the one or more levels arranged over an immediately lower and adjacent level of the one or more levels extends further inwardly toward a center of the main floor than the immediately lower and adjacent level of the one or more levels at a distance.