Groslier's seminal study of the accounts of early Spanish and Portuguese missionaries and adventurers in Cambodia was published in French in 1958 and is translated here into English for the first time. The reports of the Europeans record the earliest surviving firsthand accounts of Angkor, followed by the "rediscovery" of the site by the Khmers, over a hundred years after its abandonment in 1432 CE, and four hundred years prior to the colonisation of Cambodia by the French. While the accounts are fascinating in their own right, Groslier employs some of their key observations on the structure of Angkor in the 16th century to embark on further exploration of his own into the nature of Khmer civilisation. Complementing his studies of the early accounts with the first aerial surveys of the site, Groslier reconstructs a broad picture of Angkorian civilisation, its economy, the genius of its engineers and planners, its unique religious foundations and the pivotal humanitarian roles of its god-kings.