Peter Thomas was a 14th-century French Carmelite friar, diplomat, and prelate. Born in Périgord to a poor family, he joined the Carmelite Order and rose to prominence through his roles as a preacher and teacher. He served as a papal legate on numerous diplomatic missions across Europe and the Levant, including efforts to mediate between Venice and Genoa. Holding several high-ranking positions, he eventually became the Latin Patriarch of Constantinople and Archbishop of Crete, earning recognition for his active involvement in military and religious affairs in the East.
Ecclesiastical career

After his religious profession, Thomas served as a teacher and official preacher at the papal court in Avignon. He held several episcopal offices, including serving as the bishop of Patti and Lipari, as well as the bishop of Coron. His leadership extended to the role of Universal Legate for the East, where he worked to strengthen defenses in Smyrna and participated in military actions in Constantinople and Cyprus.
Diplomatic missions

As a trusted representative of the Holy See, he attempted to mediate conflicts between the republics of Venice and Genoa and negotiated matters regarding the royal household in Naples. He also sought to manage relations between the Byzantine Empire and the Roman Catholic Church. Later in life, he worked to organize a crusade to reclaim holy sites, traveling to various European courts to secure support for the mission.
Veneration
The Catholic Church recognizes him as a saint, having been canonized by Pope Urban VIII in 1628. He is commemorated annually on January 6. His legacy is tied to his service as a defender of the faith and his efforts to stabilize Christian territories in the Mediterranean during a period of significant geopolitical shifts.
