Hartmut Keyler (born 1936) was not only a member of the World Scout Committee and the European Scout Committee of the World Organization of the Scout Movement (WOSM) for many years, but also a quasi-permanent German participant in all World Scout Jamborees since 1961. The architect (BDA) has also made a name for himself as a graphic designer and artist. Countless scout badges, including all German contingent badges for the World Scout Jamboree, were designed by Hartmut. A particularly successful example of his artistic work is, for example, the logo and the design of the special letter for the 17th World Scout Jamboree in Korea in 1991.