The conservation and restoration of a historical Prussian double-leaf standard of 1798 made great demands on practical skill and theoretical knowledge. In the first place, there was the restoration of the silk ground of the relief embroidery, preserved only in fragments. The expansive missing parts were filled in and covered up, in addition, with reinforced silk crepe around the relief embroidery. Further problems arose in removal of the old reinforcement from previous restorations in 1813 and 1900. Thanks to this work, the original character of the standard could be restored to a large extent. The analysis constituted a major problem in the treatment of the standard. This revealed the significance of the consideration of the historical background for a successful conservation and restoration.