Why did Jan Hus leave Prague in 1412?

In 1412, Jan Hus left Prague to spare the city from the consequences of a papal interdict that had been placed upon it.12

The situation arose after Hus publicly denounced the sale of indulgences authorized by the antipope John XXIII to fund a military campaign. This defiance caused Hus to lose the support of King Wenceslas, who had previously benefited from the proceeds of these sales.12

Following his public opposition, Hus’s enemies renewed his trial at the Roman Curia. He was declared under major excommunication for refusing to appear, and an interdict was pronounced over Prague and any other location where he might reside. This religious penalty denied certain sacraments to the local population, prompting Hus to voluntarily depart in October 1412 to protect the city’s inhabitants from these ecclesiastical sanctions.12