What is "theatre in the round"

n. (alternative form of theater-in-the-round English)

Theatre-in-the-round or arena theatre (also referred as central staging) is any theatre space in which the audience surrounds the stage area.

The Glenn Hughes Penthouse Theatre in Seattle, Washington was the first theatre-in-the-round venue built in the United States. It first opened on May 16, 1940 with a production of Spring Dance, a comedy by playwright Philip Barry. The 160-seat theatre is located on the campus of the University of Washington in Seattle, Washington, and is on the National Register of Historic Places.

In 1947, Margo Jones established America's first professional theatre-in-the-round company when she opened her Theater '47 in Dallas.

The stage design as developed by Margo Jones was used by directors in later years for such well-known shows as the Tony award winning musical Fun Home, the original stage production of Man of La Mancha, and all plays staged at the ANTA Washington Square Theatre (demolished in the late 1960s), including Arthur Miller's autobiographical After the Fall. Such theatres had previously existed in colleges, but not in professional spaces for almost two millennia. It is also a popular setup used in contemporary pop concerts in an arena or stadium setting.