Final answer:
The Khmer Empire was an advanced civilization that developed in Southeast Asia between the 9th and 15th centuries CE. It constructed the world's largest pre-industrial city, Angkor, during its peak from 800 to 1431 CE.
Step-by-step explanation:
The Khmer Empire was an advanced civilization that developed in Southeast Asia between the 9th and 15th centuries CE. It is best known for constructing the world's largest pre-industrial city, Angkor, during its peak from 800 to 1431 CE. Angkor was a grand city with impressive structures such as the magnificent temple Angkor Wat, showcasing the empire's architectural and engineering excellence. The Khmer Empire's influence extended to present-day Cambodia, Laos, Thailand, and parts of Vietnam, leaving a lasting cultural and historical impact on the region.
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