Collecting, cataloguing and preserving important old books is one thing, presenting their contents online is another job. The Dutch Royal Library at The Hague, has created a digital version of the first edition of Grotius’ Mare liberum to celebrate the new translation into Dutch by Arthur Eyffinger. You can choose to view the Latin original or the new translation. On the special website Mare Liberum 1609-2009 (in either English or Dutch) you can find more information on the celebrations in the Netherlands around this epoch making work. The Peace Palace Library of The Hague, too, devoted a blog item to the festivities commemorating Grotius: Robert Feenstra and Jeroen Vervliet, the director of the Peace Place Library, have published a new translation in English (Hugo Grotius, Mare Liberum 1609-2009 (Leyden 2009)).