The inscription on the sepulchral chapel reads (in Latin) ... to God's eternal remembrance, dedicated to noble Anna z Kunowy Oświęcimówna, most beloved sister, from her most saddened and sorrowful brother Stanisław z Kunowy Oświęcim (...) as a sign of the eternal love that even death cannot stop, steeped in sadness and grief, also to his ancestors, successors and descendants, this chapel as a house of prayer for the living and a grave as a place of eternal rest for the dead, founded in the year 1647 from the birth of our Lord, gave rise to the legend of incestuous love between brother and sister, for the first time recorded in 1812.
The legend gained in popularity over time, and the chapel itself became a popular tourist attraction.
Couples who had married in the church descended into the crypt to be blessed with the love that united Anna and Stanisław.

The story has many versions and many variants.
According to the most popular version Stanisław, courtier of King Władysław IV Vasa after returning from his diplomatic missions, fell in love with his long lost younger sister.
He went to Rome in order to obtain dispensation from the Pope to marry Anna.
When he returned he found his sister dead.
Some versions say that Anna was poisoned by his mother or by a rejected suitor, waiting for the return of her brother, or at the news that the Pope blessed their relationship (as marriages were forbidden to the seventh degree of kinship).
Stanisław gave orders he should be buried next to her in the crypt beneath the chapel.
Anna and Stanisław's coffins stand next to each other.
So that he could see his beloved sister after death, he asked for a small glazed window to be added to his coffin.

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 be 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.
The inscription on the sepulchral chapel reads (in Latin) ... to God's eternal remembrance, dedicated to noble Anna z Kunowy Oświęcimówna, most beloved sister, from her most saddened and sorrowful brother Stanisław z Kunowy Oświęcim (...) as a sign of the eternal love that even death cannot stop, steeped in sadness and grief, also to his ancestors, successors and descendants, this chapel as a house of prayer for the living and a grave as a place of eternal rest for the dead, founded in the year 1647 from the birth of our Lord, gave rise to the legend of incestuous love between brother and sister, for the first time recorded in 1812. The legend gained in popularity over time, and the chapel itself became a popular tourist attraction. Couples who had married in the church descended into the crypt to be blessed with the love that united Anna and Stanisław.
The story has many versions and many variants. According to the most popular version Stanisław, courtier of King Władysław IV Vasa after returning from his diplomatic missions, fell in love with his long lost younger sister. He went to Rome in order to obtain dispensation from the Pope to marry Anna. When he returned he found his sister dead. Some versions say that Anna was poisoned by his mother or by a rejected suitor, waiting for the return of her brother, or at the news that the Pope blessed their relationship (as marriages were forbidden to the seventh degree of kinship). Stanisław gave orders he should be buried next to her in the crypt beneath the chapel. Anna and Stanisław's coffins stand next to each other. So that he could see his beloved sister after death, he asked for a small glazed window to be added to his coffin.
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 be 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.
Oświęcim Chapel