sentences:  was built in 1818, by Dutch East India Company (VOC) to conquer Diponegoro war, there were many troops come to the location and make the fortress as office of military concentration.In 1844–1848 the fortess is built in the office location for preparation to clash with Yogyakarta Sultanate and named the fortress as Fort (Generaal) Cochius.In 1856 the fortress is used as Pupillenshool for European youngster who born in Indonesia (formerly Hindia Belanda).