Established in 1575, this is the oldest mosque in Yogyakarta. Also known as the Mataram Mosque, t was rebuilt during the reign of Sultan Agung of Mataram (r. 1613-1646/1022-1056 AH). It was subsequently rebuilt in 1926, after it was destroyed by fire. It is still in use today.
SOURCES: Wiji Utomo, Yunanto. "Kotagede Mosque: The
Oldest Mosque in Yogyakarta." Kotagede Mosque: The Oldest Mosque in
Yogyakarta. 2006. Accessed July 26, 2015. https://www.yogyes.com/en/yogyakarta-tourism-object/pilgrimage-sites/masjid-kotagede/.