Maimoon Palace or Maimun Palace (Indonesian: Istana Maimun) is an istana (royal palace) of the Sultanate of Deli and a well-known landmark in Medan, the capital city of Northern Sumatra, Indonesia.

[1] Built by Sultan Ma'mun Al Rashid Perkasa Alamsyah in the years 1887–1891, the palace was designed by the Dutch architect Theodoor van Erp and covers 2,772 m2 with a total of 30 rooms.

The palace has become a popular tourist destination in the city, not solely because of its historical heritage status, but also because of its unique interior design of the palace, combining elements of Malay cultural heritage, Islamic and Indian architecture, with Spanish and Italian furniture and fittings.

It is the last surviving Malay palace, the rest having been destroyed in the 1946 social revolution.

[2] Media related to Maimun Palace at Wikimedia Commons