structural:summarization, quality:corruption
Culture

In the environment of Mataram Palace, Sultan Agung established a standard language called Bagongan obliged to be used by Mataram noblemen and officials to eradicate imbalance between them. The language was created to form a unity across royal court officials. The Sundanese language had been changed since Mataram's rule in West Java, marked by the creation of a refined language only previously known in Central Java.

Sultan Agung is also attributed with the founding of the unique Javanese calendar – this established a uniquely indigenous calendar that is still in use. Besides that, Sultan Agung had written a mystical manuscript, entitled Sastra Gending.

The development of the sacred dance bedhaya and important developments in gamelan and wayang are attributed to the court of Sultan Agung. However, there is almost no historical evidence for the claims of high artistic achievement, and there is little information at all about the arts in the court. Some written evidence comes from a handful of mentions in Dutch accounts, which can be difficult to interpret.