the 1,200-seat  Broadway Theatre  and closed on May 28, 2006. [ edit ] Monty Python's Spamalot Main article:  Spamalot Spamalot , a Tony Award-winning comedic  musical  based on  Monty Python and the Holy Grail , opened for previews on March 8, 2007, at  Grail Theater  (formerly, The  Broadway Theatre ). The