What is the name of the primary symbol, which is now outlawed outside of the context of art or science, and was widely used even on the state flag?
Strafgesetzbuch section 86a The German "Strafgesetzbuch" (Criminal Code) in § 86a outlaws "use of symbols of unconstitutional organizations" outside of the contexts of "art or science, research or teaching". This concerns Nazi symbolism in particular and is part of the denazification efforts following the fall of the Third Reich.
Seal of Minnesota The Great Seal of the State of Minnesota is the state seal of the U.S. state of Minnesota. Originally adopted in 1858, it has undergone several alterations since then, in 1971 and 1983.