Where did the third collaboration open by Richard Rodgers  and Oscar Hammerstein II , The form began to flourish in the late 1960s?
Concept musical Concept musicals were first introduced in the 1940s, though two shows compete for the title of 'first concept musical:' "Allegro" and "Love Life". The form began to flourish in the late 1960s, with the advent and subsequent popularity of "Man of La Mancha", "Cabaret", and "Hair". Stephen Sondheim, the most prolific author of concept musicals, created "Company" in 1970, bringing the genre to the forefront of the commercial realm. Director-choreographer Bob Fosse and producer-director Harold Prince were equally instrumental in making defining contributions to the concept musical. Modern examples of the concept musical include "Assassins" and "Avenue Q". Shows ranging from "Fiddler on the Roof" to "Sweeney Todd" have been argued as being concept musicals, though there is little critical agreement.
Bayreuth Festspielhaus The Bayreuth Festspielhaus or Bayreuth Festival Theatre (German: Bayreuther Festspielhaus , ] ) is an opera house north of Bayreuth, Germany, dedicated solely to the performance of stage works by the 19th-century German composer Richard Wagner. It is the venue for the annual Bayreuth Festival, for which it was specifically conceived and built. Its official name is Richard-Wagner-Festspielhaus .