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.

Documents from the reign of the English Queen Elizabeth I (1533-1603) and King James I/VI (1566-1625). Contains more than 30,000 documents from and about the major figures of that time. Contains correspondence and reports, for example about the execution of Mary, Queen of Scots. Includes scans and full text view. Source for historians.

Database of approximately 20,000 (transcribed) letters written by and sent to 17th century scholars from the Republic of the Seven United Netherlands. Search results are also visually displayed in terms of geography, time and correspondent networks. Useful for historians and history enthusiasts.

Digitized collection with the 141 diaries of the British Queen Victoria, who reigned from 1837 to 1901. About household affairs, family, politics, literature and meetings with eminent figures. With drawings by the Queen herself. Resource for biographers and scholars studying 19th century British society, but also just nice to read.

Database of thousands of letters and documents that English privateers captured from Dutch ships in the 17th and 18th centuries. Contains a global inventory of more than 700 relevant archive boxes from the British archive in London. Search or filter by keyword, period, place, location, signature, ship name, or person name. Interesting for historians and researchers of Dutch maritime history.