Oscarsteatern or "Oscars" is one of Stockholm's private theatres and is the best-known musical theatre in Sweden. It is located at Kungsgatan 63 in central Stockholm. It was built in 1906 and named after King Oscar II. The opening production was Frihetsbröderna by Jacques Offenbach, on 6 December the same year. The theatre has during the years been seen as the foremost stage for musical productions and operettas in Sweden.