Built in 1930's, the Old Changi Hospital (OCH) has quite a long and rich history. OCH is a typical replica of buildings built by British Colonial architects in the early 20's. Surprisingly OCH was not meant to be a hospital when it was first built. The British was planning to have a heavily guarded military location in the east of Singapore.

The site was strategically selected for it is high on top of a hill overlooking the sea surrounding most of the east side and the south side of the island.

For about 10 years before the war, this building compound was used as military command quarters and barracks.