In 1660, John II Casimir of Poland abandoned his claim to Sweden and signed the Treaty of Oliva, ending the Polish-Swedish War of Succession.

CNN: Saturday,

The Mass marked the role played by the Roman Catholic Church in toppling communism, particularly that of Poland's Karol Wojtyla, then newly-elected as Pope John Paul II.

BBC: The event is being marked by three days of celebrations

Besides receiving the highest civilian honors in both Poland and the United States of America, Musial shared a special connection with Pope John Paul II.

FORBES: A Final Heartfelt Tribute for "Stan the Man"

Throughout the trip, Benedict has paid tribute to his predecessor, Poland's favorite son, John Paul II, and his goal has been to exhort the inhabitants of Europe's most devoutly Catholic country to show the rest of the continent how to build a society based on Christian values.

NPR: Pope's Tour of Poland Ends with Visit to Auschwitz