This article explores the history of St Catherine’s chapel at the abbey of Savigny, head of Normandy’s only monastic congregation. Built in the twelfth century, the chapel was, at the time of its demolition in 1705, the oldest remaining part of the medieval monastic complex. It therefore appears fairly regularly in the written record and has attracted not an insignificant amount of attention as a result. That said, the near total destruction after 1789 of Savigny’s buildings, and the often contradictory nature of those written sources by which antiquarians and academics have attempted, in the absence of sustained archaeological work, to reconstruct their medieval layout, mean that a great deal remains uncertain. St Catherine’s is no exception to this rule. Its precise location and design have to date been matters of conjecture, while a great deal of what has been written about it is either inaccurate or inconsistent (or both). This article brings together for the first time all the available references to (and scholarly discussions of) the building. It combines the findings of recent archaeological work with a reassessment of the written sources to argue that the chapel’s location within Savigny’s monastic precinct was almost unique in the Cistercian world, with its closest parallels being found instead in the Cluniac one. These circumstances were born more of accident than design, but they nevertheless presented challenges for Savigny’s medieval community, the consequences of which help shed light on wider issues relating to the use and reuse of Cistercian monastic spaces.