The Walnut Street Theatre (or simply The Walnut), at 825 Walnut Street in Philadelphia, Pennsylvania, is the oldest continuously operating theatre in the English-speaking world and the oldest in the United States.The venue has three stages: the Mainstage, for the company's primary and larger productions, the Independence Studio on 3, a studio located on the building's third floor for smaller productions, and the Studio 5 on the fifth floor, which is rented out for independent productions. The walnut wishes to build a theatre in the round next door where the parking lot currently is.
The Walnut Street Theatre was built by the Circus of Pepin and Breschard, which toured the United States from 1807 until 1815. Pepin and Breschard constructed numerous venues in cities along the East Coast of the United States, which often featured, along with performances of their circus, classical plays as well as horse dramas. The theatre was founded in 1809, going by the name of The New Circus. In 1811, the two partners commissioned architect William Strickland to design and construct a stage and orchestra pit for theatrical performances and the theatre's name was changed to The Olympic. The official website says that the name The Walnut Street Theatre was first used there in 1820, though the name was changed back to The Olympic in 1822 and to The Walnut again in 1828. A travel guidebook from 1849 indicates that in the mid 19th century, this building was called The American Theatre.