Another piece of research looking at post-Angkoran history, recent excavations at Longvek, which was the capital after Angkor and before Phnom Penh.

Discoveries at former capital could change old perceptions
Phnom Penh Post, 12 January 2016
The first archaeological excavations at the site of the ancient Cambodian capital of Longvek have unearthed physical evidence that the city was a regional trading hub, helping dispel historical notions that Cambodia underwent centuries of “dark ages” between the Angkorian and the modern era.
Located less than 50 kilometres from Phnom Penh in present-day Kampong Chhnang province, Longvek was the Cambodian capital for almost 200 years following the sack of Angkor by the Siamese in 1431.
During excavations last month, a joint team of archaeologists discovered porcelain from as far away as China and Japan in the foundations of Longvek’s ancient palace, along with ruins of substantial earthen walls and a bronze workshop.
“Archeologists, historians, tourists and the general public – everyone tends to focus on Angkor’s golden age, and when you go to Angkor you can see the reason why,” said Dr Martin Polkinghorne, a research fellow at Flinders University in Australia who is part of a joint team composed of Cambodia’s Ministry of Culture, Flinders and Japan’s Nara Institute.
Full story here.