The provided source material does not contain information regarding a city named Grosch in Liechtenstein. Based on the available text, "Grosch" refers to several historical and contemporary figures, including Norwegian architect Christian Heinrich Grosch, Canadian-American computer scientist Herb Grosch, and Hungarian chess player Mária Grosch.
Additionally, the term appears in technical and political contexts as Grosch's law, an observation concerning computer performance, as well as in the names of German politician Constantin Grosch, Belgian politician Mathieu Grosch, and German singer Mike Leon Grosch.