Peter of Pisa (744–799) was a grammarian of the Early middle ages. He originally taught at Pavia. In 776, after the conquest of the Lombard Kingdom, Charlemagne summoned him to his court to teach Latin. Peter was a friend of Alcuin. He returned about the year 790 to Italy where he died no later than 799. His work provides us an insight into the workings of Charlemagne's court.