Isanavarman I of the Chenla Kingdom expanded Khmer influence to the Chao Phraya valley through his campaigns around the 7th century.
Dvaravati cities that fell under Khmer hegemony became Lavo, while the Western cities were spared from Khmer hegemony and formed Suvarnabhumi.
Lavo was the center from which Khmer authority ruled over the Dvaravati.

Around the 10th century, the city-states of Dvaravati merged into two mandalas – the Lavo (modern Lopburi) and Suvarnabhumi (modern Suphan Buri).
According to a legend in the Northern Chronicles, in 903, a king of Tambralinga invaded and took Lavo and installed a Malay prince to the Lavo throne.
The Malay prince was married to a Khmer princess who had fled an Angkorian dynastic bloodbath.
The son of the couple contested for the Khmer throne and became Suryavarman I, thus bringing Lavo under Khmer domination through personal union.
Suryavarman I also expanded into Isan, constructing many temples.
Isanavarman I of the Chenla Kingdom expanded Khmer influence to the Chao Phraya valley through his campaigns around the 7th century. Dvaravati cities that fell under Khmer hegemony became Lavo, while the Western cities were spared from Khmer hegemony and formed Suvarnabhumi. Lavo was the center from which Khmer authority ruled over the Dvaravati.
Around the 10th century, the city-states of Dvaravati merged into two mandalas – the Lavo (modern Lopburi) and Suvarnabhumi (modern Suphan Buri). According to a legend in the Northern Chronicles, in 903, a king of Tambralinga invaded and took Lavo and installed a Malay prince to the Lavo throne. The Malay prince was married to a Khmer princess who had fled an Angkorian dynastic bloodbath. The son of the couple contested for the Khmer throne and became Suryavarman I, thus bringing Lavo under Khmer domination through personal union. Suryavarman I also expanded into Isan, constructing many temples.
Lavo Kingdom