Stamp Collection A stamp collection commemorating the marriage of Prince Rainier III of Monaco and Grace Kelly. Issued to celebrate the "wedding of the century" between Grace Kelly, a Hollywood actress, and the Prince of Monaco. In the center, the date of the wedding, "19 AVRIL 1956," and portraits of the couple are depicted. Various stamps with designs related to Monaco are arranged around the perimeter. This collection is a valuable souvenir that conveys a historical moment of the time.