Documents are arranged by country. Within a country, the documents are listed chronologically and not all of them are in English. Also, catalogues of archival materials are included.
Actual documents range from current periodical articles to illustrations and personal diaries.
Because of the richness of the resources, the site is of great interest if only for browsing. The site covers modern world history, but there is a section devoted solely to twentieth century European history. An area of history is further broken down into specific subsections. The site supplies both primary and secondary sources and is an excellent resource and study guide. Note though that the site needs updating, so some of the links to sources are blind.