The Erdzeichen () is an artwork on the grounds of Munich Airport by the painter Wilhelm Holderied and the sculptor Karl Schlamminger. According to the artist, the earth sculpture at the airport is meant to be “An Island in Time,” i.e. a symbol of time sequences which are determined by the “primeval energy of the earth.” The ground-level artwork was completed in 1995. It stands in the tradition of archaic earth sculptures and modern works of Land Art, and also calls to mind Smithson’s famous “Spiral Jetty.”