He may have joined the Observants at a time when efforts were being made to unite the two branches of the Franciscans.

His preaching was credited with bringing people back to the church in his province.

John was declared Venerable by Pope Clement XII on 21 January 1733.

[4] The cause for his beatification was opened on 22 June 1948, and the process of evaluating a miracle attributed to him began on 18 January 1951.

[4] On June 10, 1997, he was canonized by Pope John Paul II in a mass at Krosno, Poland, before approximately one million people.