| Official Name: | Oudong |
| Native Name: | ឧដុង្គ |
| Nickname: | City of Past Kings |
| Settlement Type: | City |
| Pushpin Map: | Cambodia |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kandal Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Ponhea Lueu |
| Subdivision Type3: | Commune |
| Subdivision Name3: | Phsar Daek |
| Established Date: | 1618 |
| Area Footnotes: | 1000 |
| Timezone: | Cambodia |
| Utc Offset: | +7 |
| Coordinates: | 11.8239°N 104.7425°W |
| Area Code: | 12000 |
The city's name is derived from the Sanskrit word "" (Sanskrit: उत्तुङ्ग), meaning tall, which probably refers to the mountain. As it had gained religious merit and significance it might have undergone extension towards: "great" or "supreme".[3]
Oudong was founded by King Srei Soryapor in 1601, after the abandonment of Longvek in 1594. Under the reign of King Ang Duong (1841–1850), he constructed canals, terraces, bridges and erected hundreds of pagodas in this region.
From 1618 until 1866 it was formally called Oudong Meanchey, the royal capital of Cambodia for 250 years. In 1866, it was abandoned by King Norodom, taking his royal court along with him to the current capital, Phnom Penh, a dozen miles downstream from the former capital at Oudong.
During the Cambodian Civil War the town was captured by the Khmer Rouge in March 1974, who marched the citizens into the countryside, as well as executing a large number of prisoners. This proved to be a trial-run for the evacuation of Phnom Penh a year later.[4] The Government retook the town in August the same year, but evidence of atrocities was widely discarded by international journalists.
It was extensively damaged by the Khmer Rouge in 1977, along with the other temples, monuments and religious structures there.[5]
Legend has it that in the Arthaross Temple (Temple of Eighteen Points, from Pali: अट्ठारस, eighteen [6]), the Buddha located here faces north instead of the traditional direction of east, symbolizing a testimony to the strength and power of the ancient Khmer kingdom.
"Travels in the Central Parts of Indo-China" 1864:
This site was originally added to the UNESCO World Heritage Tentative List on 1 September 1992, in the Cultural category.[7] The submission has been renewed on 27 March 2020.[8]