The Cistercian brothers came to Varnhem in 1150. The fertile site on the western slope of the Billingen plateau was ideal with its access to timber, rock and fresh water. The brothers built a small monastic town and excavations have revealed an advanced water and sewer system that probably included channels for heating and ventilation. At the end of the 1200s the monastery church was the largest sacred building in Sweden and the operations flourished for several centuries more. The reformation in the 1500s closed the monastery and the church was abandoned.
A hundred years later Count Magnus Gabriel de la Gardie paid for a restoration and it is thanks to him that the edifice is in good shape today. However, the monastery was left to decay until excavations began in the 1920s. The monastic life is well documented and the museum next to the church holds a number of interesting objects from the first excavations. The handsome Varnhem Church is the burial church for the Erik royal family (11/1200s). Stockholm's founder, regent Birger Jarl lies here, as do the church's 'saviour', Count Magnus Gabriel de la Gardie and his wife, the Princess Maria Eufrosyne.