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Heritage classified

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Origin and history

The chapel of the Trinity is located at the place called Castennec, in the commune of Pluméliau-Bieuzy, in the department of Morbihan (British). It was erected at the end of the 15th century, succeeding a medieval church destroyed after being mentioned in 1380. The site, occupied from Roman times, was initially linked to the parish of Bieuzy before being ceded in 1125 to the monastery of Redon by Alain I of Rohan.

The construction of the present chapel, towards the end of the 15th century, was sponsored by the Rohan and Rimaison families, whose coats of arms still appear on the exterior walls and the frame. The bell tower was rebuilt in the 19th century. This monument, accompanied by its fountain, was listed as historical monuments on June 24, 2020.

The site thus preserves traces of a centuries-old occupation, mixing Roman heritage, Breton medieval history and late religious architecture. The chapel also illustrates the links between local lords (Rohan, Rimaison) and religious institutions, such as the monastery of Redon, which marked the area.

Today, the chapel and its fountain, located on separate communal plots (section ZO, plots 120 and 119), are protected for their heritage value. Their recent inscription underlines the importance of preserving this testimony of Morbihan's religious and seigneurial history.

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