The National Archives of Serbia were founded in 1900. Prior to that Serbia adopted a law that would enable the creation of a national archive through the adoption of a law on National Archives on the second of December 1898. However, archival work already started in 1847. The name of the archives varied from time to time, during the time that Serbia was a kingdom it was referred to as the Royal National Archive.

More information on the Wikipedia page [1].

The website, in Serbian, is [2], and English [3].