English summary: In the case of a legal dispute with an international dimension and a link to a territorial multi-unit state, how can a single territorial unit be determined whose law is to be applied? By considering the historical origins of this issue in jurisprudence and examining the development of provisions in the Hague Conventions, the national regulation of Art. 4 para. 3 of the Introductory Act to the German Civil Code as well as the corresponding European regulations, the author draws up a modern solution to the problem. German description: Wie ist im Falle einer Verweisung auf...