Anna died on January 13, 1647, apparently as a result of tuberculosis or typhoid. The event is documented in a diary written by Stanisław Oświęcim, discovered in the 19th century. The fact that in February 1647 he attempted to become a Steward of Prince Sigismund Casimir Vasa may also indicate his imminent return to earthly reality and his need to seek solace. In the records there is no evidence of his intent to marry his sister, nor is there any mention of his alleged journey to Rome to obtain papal dispensation. Stanisław was still alive 10 years after his sister's death; he fought at Berestechko and during the Deluge, and died during the invasion of the Polish–Lithuanian Commonwealth by Prince George II Rákóczi of Transylvania in 1657.