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What happened to the original buildings of Clairvaux Abbey?

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Very little of the original Clairvaux Abbey, which was founded in 1115 by St. Bernard of Clairvaux, remains today.1

The original structures have largely disappeared, with only a large 12th-century storehouse and a few other vestiges surviving. These remnants were eventually incorporated into an 18th-century monastery complex. Furthermore, the central building of the site underwent a significant transformation during the 19th century, when it was converted into a prison.1