Private International Law (PIL) in Europe is marked by fragmentation and complexity. At EU level, thus far six separate regulations determine the applicable law in different fields of the internal market (e.g. contractual/non-contractual obligations, divorce, succession). While their scope and structure are similar, they do not offer a coherent picture of EU PIL. Moreover, the regulations do not address certain issues at all. To make matters even more complicated, national PIL rules of the Member States apply for areas not yet covered by EU PIL. This state of affairs has sparked a debate on whether a set of general rules or perhaps a special regulation (Rome 0) could help to reduce this complexity. But no common position, even on the scope of such a set of rules, has been reached yet...