Online catalogue with approximately 585,000 descriptions of individual letters and parts of correspondence written in the early-modern and modern period (ca. 1500 - present). Contains information about more than 2 million letters. The letters come from the collections of Dutch heritage institutions, including the KB. For researchers.

Website with more than 50,000 digitized artworks, books, artefacts, videos and music from the collections of 3,500 European museums, libraries, galleries and archives. New content is added regularly. Interesting for researchers and lovers of music, art and literature.

Database of descriptions of Western medieval manuscripts. Focuses on texts up to approximately 1550, written in Latin or in a Western European vernacular, preserved in public and partially-public collections in the Netherlands. Search literary, scientific and liturgical texts, as well as egodocuments. With images where possible. For literary researchers.

Database of information from 1,280 property inventories from the 17th century. Concerns inventories from Amsterdam from the period 1597-1681, drawn up for auction purposes in cases such as death or bankruptcy, for example. With information about paintings, sculptures, furniture, et cetera. Includes bibliographic information about the owner. For historians who do research into art trade in the Netherlands.

Database with more than 600,000 different official singular first names that occur in the Netherlands. Among these names, you can often find the annual popularity since 1880, geographical distribution and name explanations. Interesting for those studying the popularity of specific first names.