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Heritage classified

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Origin and history

The Lech de Pen-er-Pont, also known as the Prostlon Stele, is a megalith located in the hamlet of Pen-Pont-en-Mendon, near the eponymous cross, in the municipality of Locoal-Mendon (Morbihan). This monument of the Iron Age, used as a burial, is distinguished by its spindle shape and its 2.20 m height. It has posterior engravings, including a patted cross attributed to the Templar period and the Latin inscription CROUXX PROSTLON, meaning "Cross of Prostlon". These additions probably date between the 9th and 12th centuries, marking its Christianization.

The stele is associated with Prostlon, daughter of King Solomon of Brittany (IXth century) and wife of Pascweten, Count of Vannes between 874 and 878. Died in 875 and buried in Redon, her symbolic presence in Locoal-Mendon suggests that she would have died there. The monument, described in 1936 in the Bulletin of the Morbihan Polymathic Society, illustrates the Christian re-use of pagan sites. It has been listed as a historical monument since February 12, 1942.

The Lech de Pen-er-Pont is part of a dense megalithic landscape, typical of Morbihan. His dual vocation — protohistoric funeral and then medieval memorial — made him a witness to the cultural transitions in Brittany. The Latin engravings and the cross underline the Templar influence on the island of Locoal, while its classification in 1942 confirms its heritage importance.

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