The Worcester Palladium, also known as The Palladium or Palladium Theatre, is an all-ages concert hall and performance venue located in Worcester, Massachusetts. The Palladium was designed by architect Arlan W. Johnson and opened as a theatre in 1928 as the Plymouth Theatre. It has a seating capacity of 2,160 in the Main Room and 500 in the upstairs room and is a popular venue for rock and metal bands.