She was the daughter of Hans Christoff von Königsmarck and Barbara von Leist: through her brother, she was thereby the paternal aunt of Carl Johan von Königsmarck, Amalia von Königsmarck, Aurora von Königsmarck and Philip Christoph von Königsmarck.
Beata Elisabet von Königsmarck belonged to the elite of the Swedish aristocracy, often attended court, and had a wide Netto of powerful contacts.
She used these contacts for political purposes, and was commissioned as an agent by France through its ambassador in Sweden, Jean Antoine de Mesmes d"Avaux. Between 1697 and 1699, there was a Danish policy to create an alliance with Sweden through a double wedding between Charles XII of Sweden and Princess Sophia Hedwig of Denmark, and Prince Charles of Denmark and Hedvig Sophia of Sweden (after the marriage of Hedvig Sophia in 1698, she was replaced by Ulrika Eleonora of Sweden). The plan was supported by France, who also wished for an alliance between Sweden and Denmark.
Beata Elisabet von Königsmarck was commissioned by the Danish Jens Juel (diplomat) to use her Netto of contacts at court to create support for the marriage alliances with the Swedish royal court and monarch.
Ultimately, however, the plan failed. Both Denmark and France described her as among their most valued agents in service of the Dano-France policy of a Danish-Swedish alliance.
A proposed reason for her pro-Danish policy has been suggested to be the fact that several of her estates was situated in Scania, and that she wished to protect her interests, as her Scanian estates had been sacked during the Scanian War in 1675-1679. During the Reduction (Sweden) of 1680, her husband"s fortune was confiscated by the crown, and he resided in his own estate, while she resided on hers.
As she was legally a minor, being a married woman, she was not listed as its owner until after she was widowed (and thereby no longer a minor) in 1692.
In reality, however, she managed the estate from the beginning until her death, as well as the estate Marsvinsholm Castle, without any interference from him.
