In 1894, as part of his extensive restoration work, the restorer Albert Olbers added an animal frieze with turkeys to the medieval scene of child murder in Bethlehem. 40 years later, the painter and restorer Lothar Malskat claimed that the turkeys were real, i.e. from around 1300. This proves that the Vikings must have been in America before Columbus and had brought the turkey motif from there. This was exploited by the ruling system for propaganda purposes. It was not until Kurt Wehlte's technical examination in 1948 that all doubts that the Puters were forgeries were eliminated. In 1952 Malskat retracted his earlier assertion and confessed to further forgeries - including a monumental "Salvator Mundi" in the side aisle - in Schleswig Cathedral during the restoration work in 1938. The turkey frieze is still visible