The Monastery of Santa Maria de Santes Creus (Catalan: Reial Monestir de Santa Maria de Santes Creus) is a Cistercian monastery in the municipality of Aiguamúrcia, Catalonia, Spain.

This is the dormitory, a large (c. 46 x 11 m), undecorated hall without any partitions for the monks, who, initially slept on straw mattresses lying on the floor. The wooden rafters are supported on a series of ogival stone arches that spring from corbels in the side walls.