Олимпико
The oldest surviving indoor theatre of the modern era, the Teatro Olimpico in Vicenza (1585), is sometimes incorrectly referred to as the first example of a proscenium theatre. The Teatro Olimpico was an academic reconstruction of a Roman theatre. It has a plain "proscaenium" at the front of the stage, dropping to the "orchestra" level, now usually containing "stalls" seating, but no proscenium arch.