National Museum of Cambodia

The National Museum of Cambodia houses one of the world's greatest collections of Khmer cultural material including sculpture, ceramics and ethnographic objects from the prehistoric, pre-Angkorian, Angkorian and post-Angkorian periods. Unfortunately there is no photography allowed inside.  Also, it is poorly maintained with plaques missing, and objects not protected.  
The one fascinating room was about France's influence to recruit Cambodians to fight for France during WW1