Hans Sachs (1881-1974) was a Berlin dentist whose greatest accomplishment came from his passion for posters. He was the leading founder of an important group devoted to collecting posters which started an influential poster magazine. Before the seizure of his collection of 12,500 posters during Kristallnacht on 9 November 1938, he had the largest collection of posters in Germany, probably in the world. He was able to escape to the United States, but he never regained possession of the posters. After years of court battles, 4,344 posters were returned to his son in 2013. Some will be given to museums, but most have been or will be sold at auction.