Alexander V
On 20 December 1409, Alexander V issued a papal bull that empowered the Archbishop to proceed against Wycliffism in Prague. All copies of Wycliffe's writings were to be surrendered and his doctrines repudiated, and free preaching discontinued. After the publication of the bull in 1410, Hus appealed to Alexander V, but in vain. The Wycliffe books and valuable manuscripts were burned, and Hus and his adherents were excommunicated by Alexander V.