The Deutsches Historisches Museum is home to a very large collection of posters, which are cared for by a dedicated conservator from the Paper Conservation Studio. The demands and needs of posters have much in common with all aspects of paper conservation, however, posters often have particular technical requirements that affect how they are treated, be it purely preventive conservation work or more invasive measures to restore the poster or improve its aesthetic qualities. The mostly large formats and wood-based paper result in patterns of damage and losses typical to posters that can be extensive. As ephemera, the posters were generally made for short-term advertising campaigns and the materials used to make them can cause immense problems today, dictating how they are stored, restored, and mounted. Frequently, their readability has been compromised due to inappropriate handling, poor storage conditions in non-archival facilities, or earlier restoration work, which we aim to remedy as far as is possible. Treatments can entail filling in losses as well as reconstructing entire sections.