What is the oldest surviving theater in the world?
Teatro all'antica
The Teatro all'antica ("Theater in the style of the ancients") is a theatre in Sabbioneta, northern Italy; it was the first free-standing, purpose-built theater in the modern world. The Teatro all'antica is the second-oldest surviving indoor theater in the world (after the Teatro Olimpico in Vicenza), and is, along with that theater and the Teatro Farnese in Parma, one of only three Renaissance theaters still in existence.
Blue Mouse Theatre
The Blue Mouse Theatre (1923) (originally known as Blue Mouse Jr.) is a small second-run movie theater located in the Proctor District in the north end of Tacoma, Washington. It is Washington's oldest continuously operating theater (a few blocks from the state's oldest bowling center), opened November 23, 1923.