The Middle Neolithic enclousure of Le Peu at Charmé was discovered by aerial survey in 2011.
Sources:
- The emergence of monumental architecture in Atlantic Europe: a fortified fifth-millennium BC enclosure in western France, https://www.cambridge.org/core/journals/antiquity/article/emergence-of-monumental-architecture-in-atlantic-europe-a-fortified-fifthmillennium-bc-enclosure-in-western-france/8ED741E657BCBE5522E7EC273F7D697D