Moutier-Grandval Abbey, Benedictine abbey in Moutier, Switzerland

Moutier-Grandval Abbey was a Benedictine abbey founded around 640 near the villages of Moutier and Grandval, on land granted by Gundoin, Duke of Alsace, along the old route to the Pierre Pertuis Pass. Its buildings have disappeared; excavations in the Rue Centrale in 2008 and 2012 uncovered remains from the 7th to 10th centuries, the earliest from the last quarter of the 7th century.

Around 640, a Duke of Alsace granted land to Luxeuil Abbey, which enabled the founding of this monastery under Saint Germanus of Granfelden. The community developed into an influential religious institution that shaped intellectual life across the medieval period.

The abbey's name survives in the Moutier-Grandval Bible, an illuminated manuscript of about 840 probably written at Tours and owned by the abbey until the French Revolutionary dissolution, when it was found in Delémont by children. It is now British Library Add MS 10546, with full-page miniatures of Adam and Eve, Moses and an allegorical scene.

The abbey buildings themselves no longer stand; remains from the 7th to 10th centuries were uncovered in 2008 and 2012 during rescue excavations on Rue Centrale, in front of houses No. 57 and 59 and in the cellar of No. 57, the former Hôtel du Cerf. The chapelle de Chalière, a Carolingian building with faded 11th-century wall paintings, now serves as the cemetery chapel at Perrefitte. The relics of Saints Germanus and Randoald are kept in the church at Delémont.

The Moutier-Grandval Bible, an illuminated manuscript of about 840 probably written at Tours, was owned by the abbey until the French Revolutionary dissolution. It was then apparently forgotten and found in Delémont by children. It is now British Library Add MS 10546, with three full miniature pages, two showing Genesis scenes including Adam and Eve in registers like a strip cartoon.