Hermenegild, Visigothic prince and saint

Saint Hermenegild or Ermengild, was the son of King Liuvigild of the Visigothic Kingdom in the Iberian Peninsula and southern France. He fell out with his father in 579, then revolted the following year. During his rebellion, he converted from Arianism to Chalcedonian Christianity. Hermenegild was defeated in 584 and exiled. His death was later celebrated as a martyrdom due to the influence of Pope Gregory I's Dialogues, in which he portrayed Hermenegild as a "Catholic martyr rebelling against the tyranny of an Arian father."

The Visigoths were a Germanic people united under the rule of a king and living within the Roman Empire during late antiquity. The Visigoths first appeared in the Balkans, as a Roman-allied barbarian military group united under the command of Alaric I. Their exact origins are believed to have been diverse but they probably included many descendants of the Thervingi who had moved into the Roman Empire beginning in 376 and had played a major role in defeating the Romans at the Battle of Adrianople in 378. Relations between the Romans and Alaric's Visigoths varied, with the two groups making treaties when convenient, and warring with one another when not. Under Alaric, the Visigoths invaded Italy and sacked Rome in August 410.

April 13 is the 103rd day of the year in the Gregorian calendar; 262 days remain until the end of the year.