Brief synthesisThe Monastic Island of Reichenau on Lake Constance in south-west Germany represents a masterpiece of human creative genius as the ensemble of the three churches on the monastic island constitutes an exceptional example of an integrated group of medieval churches retaining elements of Carolingian, Ottonian, and Salian architecture that are relevant to the history of architecture. Criterion (iv): The churches on the island of Reichenau retain remarkable elements of several stages of construction and thus offer outstanding examples of monastic architecture in Central Europe from the 9th to the 11th centuries. Ownership of the religious buildings on the island of Reichenau is shared between a number of institutions. There is no official buffer zone for the property, but its island location of Reichenau in the middle of the northern reaches of Lake Constance provides adequate equivalent protection. The policy ensures State control over the conservation of the cultural and natural assets on the island of Reichenau and continuous implementation of the necessary conservation and restoration measures.