The Dutch admiral Michiel Adriaenszoon de Ruyter (1607-1676) is known as one of the most famous skippers of the 17th century. In honour of his 400th birthday on March 24, 2007, the Democratic Republic of the Congo dedicates a commemorative coin to the famous Dutchman. This coin is acrylic and shows a contemporary portrait of Michiel de Ruyter in detail as well as a three-dimensional view of his famous flagship “De Zeven Provincien“.