From the European Commission:

Introduced in August, a new European Union law reduces the legal headaches that arise when a family member with property in another EU country passes away. The new regulation on cross-border successions (link above) makes it easier for European citizens to handle the legal side of an international will or succession. By clarifying which EU country’s courts will have jurisdiction to deal with the inheritance and which law the courts will apply, the law brings legal certainty to the estimated 450,000 European families dealing with an international succession each year. With over 12.3 million EU citizens resident in another EU country, the law is likely to be of interest to many more. Member States now have three years to align their national laws so that the new EU rules become effective. A leaflet explaining the new law is available in 22 EU languages.