The district counsilor declared that the case has been reported to the police.
The Belarusian journalist Tadeusz Giczan wrote on Thursday that such demolition takes place using heavy equipment.
Anti-Christian vandalism is on the rise in Poland.
Some in the square tried to stop the protestors and were shocked by their presence.
Because of the extent of the damage, it was thought that the act was committed by more than one person.
The acts of vandalism took place right before Easter
Jadwiga was the first female monarch of the Kingdom of Poland, reigning from the 16th of October 1384 until her death.