From the Wikipedia page 
The National Archives of Sweden (Swedish: Riksarkivet, RA) is one of the oldest public agencies in Sweden, with a history leading back to the Middle Ages. The chief of Riksarkivet is called the Riksarkivarie.
A branch within the Archives has a special responsibility for public heraldry in Sweden. The head of this branch has the title State Herald (statsheraldiker).
Since 1963, the Royal Palace Archives at Stockholm Palace has been a section under the National Archives.
The Website, in Swedish, is .