Kreuzerhöhung
The feast originally commemorated the dedication of the Basilica of the Resurrection, and was linked with the finding of the Cross shortly thereafter. Saint Helena reportedly found the Cross on May 3, 355, but most Catholic and Eastern Orthodox rites celebrate the Feast of the Cross on September 14, commemorating the day in 628 when a piece of the Cross taken by the Persian Empire was recovered by the Byzantine Emperor Heraclius.