Gamelan outside Indonesia gave a new impetus to the performance of gamelan and Javanese dance in the Netherlands. Together with Mr and Mrs Ronosuripto, the Amsterdam Gamelan group played many concerts and performances with Javanese dance and shadow puppetry (wayang kulit). Rien Baartmans, who as a child had been taking lessons from Bernard IJzerdraat, studied wayang and kendhang with Pak Ripto, which very much stimulated his own group Ngesthi Raras in Haarlem. In 1978 the new gamelan society Naga, founded by Rob van Albada, acquired a gamelan from Solo. This gamelan was used by several groups, performing traditional and modern music for gamelan.
Gamelan common in national arts conservatories founded in the middle of the 20th century. Gamelan's role in rituals is so important that there is a Javanese saying, "It is not official until the gong is hung". Some performances are associated with royalty, such as visits by the sultan of Yogyakarta. Certain gamelans are associated with specific rituals, such as the "Gamelan Sekaten", which is used in celebration of "Mawlid an-Nabi" (Muhammad's birthday). In Bali, almost all religious rituals include gamelan performance. Gamelan is also used in the ceremonies of the Catholic church in Indonesia. Certain pieces are designated for starting and