The excavated dolmen (cairn) can be found displayed behind a glass wall at the back of the Angers Chateau gift shop.
The original site is a rocky promontory overlooking the Loire river, occupied since at least the Neolithic period. Here, a five chambered cairn was built. This rocky promontory continued to be built upon for thousands of years as it was strategically significant.
In the Roman period, a house was built over the cairn, leaving two heated rooms, one with a fireplace and wastewater drainage and the other had heating pipes inside the walls. Moving on several hundred years, the Counts of Anjou were able to use this heating system of this Roman house to heat a bathroom on the floor above in their own building.
The site was excavated relatively recently and a visitor display created during the building of a huge hall to house the Apocalypse Tapestry (dated 1375, over 100 meters long).
Condition 1 Ambience 3 Access 5 Accuracy 5
www.chateau-angers.fr/en/discover/history-of-the-castle-of-angers
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