Peter of Cornwall (1139/1140– July 7, 1221) was a medieval scholar and prior of Holy Trinity Priory, Aldgate.
In 1210 Peter was one of two intermediaries between King John of England and Stephen Langton, Archbishop of Canterbury, during a series of negotiations which failed to achieve an end to the interdict.
Peter dedicated his Liber disputationum contra Symonem Iudeum to the exiled Stephen Langton.
It also includes two important otherworld visions relating to St. Patrick's Purgatory, the well-known Tractatus de Purgatorio Sancti Patricii, which is provisionally dated to between 1135 and 1154, and another work related directly to Peter by a monk from Mellifont Abbey, who heard second-hand of this other vision, which took place c.
[1] Peter was buried in the chapel of the Blessed Virgin at Holy Trinity Priory, Aldgate.