Below is the hymn Vexilla Regis prodeunt, composed by Venantius Fortunatus, and translated from Latin to English by John M. Neale, Mediaeval Hymns and Sequences, 1851.
According to legend, on November 19, 568, St. Radegund presented to the town of Poitiers a fragment believed to be that of the True Cross. Venantius Fortunatus was the person chosen to accept the relic when it was brought to Poitiers. The bearers of the holy relic were two miles outside the town, when Fortunatus, along with an enthusiastic gathering of believers, some carrying banners, crosses and other sacred emblems, went forth to meet them. They are said to have sung this hymn which Venantius Fortunatus had written.