Jayavarman 7th, arguably the most ambitious of Khmer kings, was a great builder: he ordered the construction of many large temples and other public monuments, and also over a hundred hospitals. Art historian Dr. Peter Sharrock from the University of London explains how the hospitals were staffed, supplied and why everyone could use them.

Photo: Jayavarman 7th 1125-1218 (DeAgostini/Getty Images)