On three occasions between c. 1340 and c. 1440 it was alleged that the renowned Welsh Cistercian abbey of Strata Florida was attacked and invaded by fellow White Monks. This article explores these incidents in detail for the first time. It argues that these episodes should not be seen as reflecting a decline from Cistercian standards or of an increasingly local outlook among the Order’s abbeys in Pura Wallia but rather as indications of the prestige of Strata Florida within the Cistercian affiliation that derived from Whitland, and as products of local rivalries within the wider communities in which the Cistercian abbeys of mid Wales were located
