Compléter completeVersion en ligne This activity is focused on grammar. par Yuly Andrea Jula Castro 1 full the covered which of was were city the of the of was covers are the of the The amazed was the this From 9th to 14th centuries , when Europe still struggling out of Dark Ages , the Cambodian Empire Angkor most of present - day Cambodia , Laos , Vietnam , and Thailand . heart of empire during 12th century the ancient capital Angkor Thom , near present day Siem Reap , the site the world's largest temple complexes , rediscovered in 1861 . This spectacular built over 30 years under reign of King Suryavarman II ( 1113 - 1150 ) . The area about 400 square kilometres and is of finest examples of Khmer art and architecture . Tourists always at the scale the plac e