•In January 1521, the Pope Leo X excommunicated Luther. He was then summoned to appear at the Diet of Worms, an assembly of the Holy Roman Empire. He refused to recant and Emperor Charles V declared him an outlaw and a heretic. Luther went into hiding at Wartburg Castle. In 1522, he returned to Wittenberg and in 1525 married Katharina von Bora, a former nun, with whom he had six children.