Verrijkt Koninkrijk: Linking a Historiographical Text to the Web of Data Victor de Boer *1 , Johan van Doornik 2 , Lars Buitinck 2 , Maarten Marx 2 , Tim Veken 3 , and Kees Ribbens 3 1 The Network Institute, VU University Amsterdam, the Netherlands 2 Informatics Institute, Universiteit van Amsterdam, the Netherlands 3 NIOD Institute for War, Holocaust and Genocide Studies, Amsterdam, the Netherlands March 29, 2013 1 Introduction We here present our work in the form of an extensive case study: the enriched publication of the important Dutch historiographical work Het Koninkrijk der Nederlanden in de Tweede Wereldoorlog (The Kingdom of the Netherlands in WWII) by Dr. Loe de Jong. The Koninkrijk -as we will refer to this text from here on- remains the most appealing history of German occupied Dutch society (1940-1945). Published between 1969 and 1991, the 14 volumes, consisting of 30 parts and 18,000 pages combine the qualities of an authoritative work for a general audience, and an inevitable point of reference for scholars. In the Verrijkt Koninkrijk (Enriched Kingdom) project, we aim to provide enriched access to the original text to assist historians in their research. We describe a method and tools to make a historiographical text available in structured form on the Web and to connect it to external sources on the Web of Data. We show how these explicit links between text fragments and external background knowledge can be used by historical researchers to inves- tigate relevant hypotheses. Important in this respect is that this data-driven approach still connects to the historical methodology by providing explicit links to the original text from manually constructed as well as automatically gener- ated data. In Figure 1, we show the overall approach and the tools used in each * corresponding author. email: v.de.boer@vu.nl 1