Musical “Grease” opened at the New London Theatre.
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Euridice, the oldest-surviving opera, premiered in Florence, Italy.
The Rocky Horror Picture Show premiered at the Belasco Theater, New York City, US, and ran for 45 performances.
Stephen Schwartz's musical 'Godspell' premiered off-Broadway.
Andrew Lloyd Webber's musical 'Cats,' based on poetry by T. S. Eliot, first premiered in the West End, London.
The musical comedy 'Joseph and the Amazing Technicolor Dreamcoat' was first performed at the Minskoff Theatre, New York City, US.
