The Khmer Empire is next to the Angkor Empire.
The Khmer Empire , officially the Angkor Empire , the predecessor state to modern Cambodia ( `` Kampuchea '' or `` Srok Khmer '' to the Khmer people ) , was a powerful Hindu-Buddhist empire in Southeast Asia . Its greatest legacy is Angkor , in present-day Cambodia , which was the site of the capital city during the empire 's zenith .