The Westwork of Corvey in Höxter on the River Weser is one of the few Carolingian structures of which the main parts have been preserved, and the only example of a westwork building from that time still standing. Criterion (ii): Corvey possesses the only almost completely preserved Carolingian Westwork. Criterion (iv): The Westwork of Corvey abbey is an outstanding testimony to Carolingian building and monastic culture, which was not solely an expression of religious content and clerical goals but also an instrument to secure sovereignty and to develop the country. The form and the design of the Carolingian Westwork are largely preserved in its original substance and material. Corvey offers the only reliably analyzed source of knowledge about the painting of flat and vaulted plaster ceilings in Carolingian times.