Reichenau Abbey was a Benedictine monastery on Reichenau Island. It was founded in 724 by the itinerant Saint Pirmin, 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 Santfrid I (Nebi). Pirmin's conflict with Santfrid resulted in his leaving Reichenau in 727.