Maurice, Prince of Orange
Van Swieten's frequent travels and good connections made her a popular messenger between the two territories, and in 1615, she was given the title General Director by the Netherlands when she was asked to handle an assignment regarding a valuable carpet. In 1621, she handled the negotiations between the ruler of the Netherlands, Maurice, Prince of Orange, and the regent of the Spanish Netherlands, Albert VII, Archduke of Austria in Brussels, regarding the authority over some of the provinces. After this, she was regularly used as a diplomat and a messenger between the two courts; she was given the formal authority to issue negotiations about matters of state, and her expenses were covered by the state. In 1624, she was responsible for a negotiation regarding a prisoner exchange. Her last paid assignment was performed in 1629. She died in The Hague.