In 2020 a Lao/Australian archaeological research team revisited one of the largest megalithic jar sites in Laos, Site 1, and undertook excavations in an effort to more fully understand the ritual practice at the site. This paper reviews previous research undertaken at the site and describes the recent excavation which revealed evidence of secondary burial practice dating to the 8th to thirteenth centuries. The research confirms the use of Site 1 as a burial site where multiple individuals were interred in secondary burials in shared mortuary contexts.