Danevirke
The Danevirke or Danework ( modern Danish spelling: "Dannevirke"; in Old Norse; "Danavirki" , in German; "Danewerk" , literally meaning "earthwork of the Danes" ) is a system of Danish fortifications in Schleswig-Holstein , Germany . 
<triplet> Danevirke <subj> Schleswig-Holstein <obj> located in the administrative territorial entity