Citadel Prins Frederik

The Citadel Prins Frederik, also called Fort Prins Frederik, was a fortification built in 1837 by the Dutch in Batavia (now Jakarta), in the Dutch East Indies (now Indonesia). It was located at Wilhelmina Park, which demolished around 1961 and replaced by the Istiqlal Mosque.The local people often referred to the fort as Gedung Tanah (The Ground Building).The site was once the location of a tavern, built before 1669. In 1723 sergeant-major Herman van Baijen rebuilt the tavern as a large country house. Later, from 1743 to 1820, the building was used as a hospital, called the Outer Hospital because it was outside the city walls.