The play "Zbigniew, tragedya z chórami w trzech aktach. Rzecz w roku 1109" (eng. Zbigniew, tragedy with choirs in three acts. In 1109) by Julian Ursyn Niemcewicz, prominent Polish poet and dramatist, co-author of the Constitution of 3 May 1791. The copy with a dedication from Julian Ursyn Niemcewicz to Princess Lubomirska.
The play with the subtitle: "Performed at the National Theatre on November 6, 1819". Text in Polish.