to 1617. There is a wide variety of materials available, including documents from the ministry, parliament, and central authorities. Documentation of government decisions from the 1840s to 1980s are available to researchers. Around 100,000 maps and drawings of state civilian buildings from 1697 to 1993 are preserved in the archive. Although the primary focus of the National Archives is government records, there are also some personal archives, which were in the past obtained via confiscations and seizures, and more recently as donations. Personal collections include feudal archives from the 17th and 18th century, such as the Skokloster collection, Sjöholms, Stafsund and Ericsberg archives, and other archives of statesmen and cultural personalities. There are also some archives of non-governmental associations and businesses, as well as news archives. In 2015 the archival holdings amounted to approximately 750 kilometers of shelving - comprising mainly parchment and paper. The digital media holdings included 130 million digital images. The amount of documents increases continuously because of the delivery of documents from the Cabinet Office and other central agencies. Novgorod Occupation Archives The "Novgorod occupation archives" (Swedish: Ockupationsarkivet från Novgorod) is the name used since the 1960s for a unique collection of documents in the National Archives. They are written in Russian by Russian administrators of the city of Veliky Novgorod during the years 1611-1617 when the Swedish army occupied the city. The documents include both originals and copies that were intended to be sent to Moscow. When the Swedish army withdrew from the city, the commander Jacob De la Gardie collected these documents as useful evidence for the peace negotiations and brought them back to his quarters in Estonia. Later the collection was sent to Stockholm, where its importance as a source of Russian history was recognized in the mid-19th century. They were first catalogued in 1964 by Russian historian Sergei Dmitrievsky. An improved catalogue was printed and published in 2005. The documents (which comprise 30,000 pages) were initially microfilmed, and the monochrome microfilm later digitized. This digital archive is available online. The collection consists of two series. Series 1 has 141 books and series 2 has 368 scrolls. Digital Collections and Access The National Archives is subject to open government, which means that the holdings in general are available to the public - including researchers and research-related individuals. The exception is made for confidential documents or certain perishable older material. Many of the oldest