In 1638 Amsterdam got its first theatre and balet performances were given in this theatre soon after that. Opera could be seen in Amsterdam from 1677. The metronome, one of the most important advances in European classical music was invented here in 1812 by Dietrich Nikolaus Winkel. At the end of this century the Rijksmuseum and Gemeentelijk Museum were built. In 1888 the Concertgebouworkest was established. With the 20th century came cinema, radio and television. Though the studios are in Hilversum and Aalsmeer, Amsterdam's influence on programming is very strong.