For 10 points, name this empire whose land now comprises much of Cambodia, and which gives its name to a Communist party led by Pol Pot.
This empire's most prolific leader established its capital at Roluos, where he ordered the construction of a namesake group of temples with monasteries. One leader of this empire engineered the successful capture of the Mon Empire, whose previous incarnation, the Funan Empire, had sparred unsuccessfully with Chendla. A religious complex constructed in this empire features "face towers" that show a smiling king. Those formerly gold-covered towers were described by emissary Zhou Daguan upon his visit to this empire's city of Bayon. A switch from primarily worshipping Shiva to worshipping Vishnu came about during the reign of this empire's King Suryavarman II, who constructed a temple complex called Angkor Wat. For 10 points, name this empire whose land now comprises much of Cambodia, and which gives its name to a Communist party led by Pol Pot.
This empire's most prolific leader established its capital at Roluos, where he ordered the construction of a namesake group of temples with monasteries.
Khmer Empire [do not accept "Khmer Rouge"]