It was founded in 724 by the itinerant Saint Pirmin,[1] who is said to have fled Visigothic Spain ahead of the Moorish invaders, with patronage that included Charles Martel, and, more locally, Count Berthold of the Ahalolfinger and the Alemannian duke Hnabi.
[5] Reichenau was greatly fostered by its position on the highway to Italy, which was frequented by Greek and Italian, and even Irish and Icelandic pilgrims and wayfarers.
[6] Bishop Egino of Verona resided in Reichenau, and built (799) the parish church of St. Peter at Niederzell, a small Roman basilica with two towers, whither he retired to lead the life of a hermit, dying in 802.
The patronage of the Carolingians resulted in the rapid growth of the monastery in importance, being granted successively immunity from secular authority, jurisdictio fori the status of a principality of the empire, and complete exemption from episcopal jurisdiction.
Because of its historical importance and exceptional art and architecture, Reichenau Abbey (along with other monuments on the island) was inscribed on the UNESCO World Heritage List in 2000.