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Photo: Édouard Hue (User:EdouardHue), CC BY-SA 3.0 via Wikimedia Commons
Its oldest parts are dated from the 16th and 18th century. It was the abbot Gillard who decided to restore the church. He made this building the shrine of the Grail. Indeed, many references to the quest of the Grail are illustrated in the church.
The Église Sainte-Onenne, or Église Saint-Eutrope, also known as the Église du Graal, is a parish church in the commune of Tréhorenteuc in Brittany. It is the only church dedicated to a local Breton saint, St Onenne. However, it is best known for its fittings and stained glass windows commissioned by the Abbé Gillard between 1942 and 1962 which mix pagan themes from Arthurian legend with Christian elements.
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