The initial settlement of Phnom Penh is believed to have been established since the 5th century AD, according to the discovery of ancient kiln site in Choeung Ek commune of Dangkao district, southern part of central Phnom Penh in early 2000s. Choeung Ek archaeological site was one of the  largest kiln pottery center in Cambodia and the earliest known kiln sites in Southeast Asia to produced the ceremonial vessels known as kendi from 5th to 13th century. Archaeologist stated that a large community is surrounded by a circular earthwork structure that is 740 metres in diameter and 4 metres high, built in the 11th century. In addition, there are remnants of other ancient village infrastructure, irrigation system, inscription, Shiva linga as well as an ancient brick temple foundation and its ornate remains which dated back to Funan era. 