Hussenstein in Konstanz, plaque with the date of inauguration. This erratic block with 35.000 kg weight marks the place where the Bohemian reformer Jan Hus (6 July 1415) and his a friend and fellow Jerome of Prague (30 May 1416) have been burned as heretic during the Council of Constance. The memorial stone from blackish limestone was funded by donations. It was inaugurated on October 6, 1862. Regularly on July 6, the Hussenstein is venue for the annual commemoration of Jan Hus and Jerome of Prague.