 That autumn, Johann Eck proclaimed the bull in Meissen and other towns.Karl von Miltitz, a papal nuncio, attempted to broker a solution, but Luther, who had sent the Pope a copy of "On the Freedom of a Christian" in October, publicly set fire to the bull and decretals at Wittenberg on 10 December 1520, an act he defended in "Why the Pope and his Recent Book are Burned" and "Assertions Concerning All Articles".As a consequence, Luther was excommunicated by Leo X on 3 January 1521, in the bull "Decet Romanum Pontificem".