From the Open Knowledge Foundation Blog:
In practice, however, determining whether a work has passed into the public domain can prove very difficult. This is especially true when attempting to determine the public domain status of content in multiple jurisdictions. As part of the EuropeanaConnect project, Knowledgeland and the Institute for Information Law at the University of Amsterdam have developed public domain calculators to determine whether a certain work or other subject matter vested with copyright or neighbouring rights (related rights) has fallen into the public domain. These public domain calculators have been developed for 30 countries (the European Union plus Switzerland, Iceland & Norway) and are available at www.outofcopyright.eu.
Users can use the calculators (and the underlying research published at outofcopyright.eu) to determine the copyright status of works in all these countries. This is the first time that this question has been structurally researched across all European jurisdictions.
The results of this research of national copyright laws show a complex semi-harmonized field of legislation across Europe that makes it unnecessarily difficult to unlock the cultural, social, and economic potential of works in the public domain. Identification of works as being in the public domain needs be made easier and less resource consuming by simplifying and harmonizing rules of copyright duration and territoriality.
Outofcopyright continues to adjust and refine its calculators. It is also researching how to make calculation possible using large datasets like bibliographica, DBPedia, and the Europeana datasets on cultural objects in Europe.
Read the Complete Blog Post