Which pope launched the First Crusade and reshaped papal leadership in Europe?

The story behind the answer

He proclaimed the First Crusade at the Council of Clermont in 1095, urging Latin Christians to aid Byzantium and liberate Jerusalem, and offering remission of sins to those who “took the cross.” By turning armed pilgrimage into a papally directed movement, he shifted both spiritual and military leadership toward Rome, proving that the papacy could mobilize Europe on a continental scale.

A former Cluniac reformer and champion of Gregorian ideals, he built on efforts to free the Church from secular control and crafted a more activist papacy. His preaching networks, the potent symbol of the sewn cross, and coordination with nobles set a template for later crusades and helped forge the papal monarchy that would dominate European politics in the 12th–13th centuries.