Holy Lance
During the June 1098 Siege of Antioch, a monk named Peter Bartholomew reported that he had a vision in which St. Andrew told him that the Holy Lance was buried in the Church of St. Peter in Antioch. After much digging in the cathedral, Bartholomew allegedly discovered a lance. Despite the doubts of many, including the papal legate Adhemar of Le Puy, the discovery of the Holy Lance of Antioch inspired the starving Crusaders to break the siege and secure the city.