Together with the Palace of Würzburg by Balthasar Neumann, the Wies Church is one of two buildings in Bavaria to be recorded on the World Heritage List compiled by UNESCO. Built by Dominikus Zimmermann betwenn 1746 and 1754, this pilgrimage church in its special setting at the foot of the Alps represents the culmination of Bavarian Rococo. In 1984, the Wies Church had to be closed because of serious deterioration of the interior shell of the domed, centrally planned building; sections of plaster and stucco are dangerously loose and even the famous ceiling frescoes by Johann Baptist Zimmermann have cracks and cavities. The restoration work, which will probably take three years, was preceded by a documentation of the deterioration problems, and by extensive preliminary investigations. The investigations revealed that the original paint scheme from the time of construction is widely preserved in the altar space. The two 18th-century paint schemes in the central space, on the other hand, have suffered more from deterioration and were extensively reworked in the course of restorations in 1903-1907 and after 1950.