The monastery church is dedicated to St. Aurelius.
According to legend, Aurelius died in Milan around 475 and was interred there. 350 years later, Bishop Noting of Vercelli, an ancestor of the counts of Calw, transferred Aurelius' remains to Hirsau. A monastery was founded for their worship. When the monastery was re-founded in 1049, the relics, which were believed to have been lost, were rediscovered. In 1489, as part of a revived worship of Aurelius, his remains were transferred from the Church of St. Aurelius to the Church of St. Peter and Paul.
Following the Reformation, the new ruler over the monastery, Duke Ulrich von Württemberg, gave Aurelius' remains to Count Wilhelm von Zimmern in 1555, who stored them in his Herrenzimmern Castle. From there, they were transferred to the palace chapel of the House of Hohenzollern-Hechingen. A family representative left the remains to Zwiefalten Monastery in 1690, a subsidiary monastery to Hirsau. A small part of the relic was transferred back to Hirsau on the occasion of the restoration of the Church of St. Aurelius in 1956.
