Paul of Segni was an Italian nobleman and Franciscan friar who served as the bishop of Tripoli in the Levant from 1261 until 1285 and as a papal legate to the kingdoms of Germany and Sicily in 1279–1280. He was the most prominent churchman from the east at the Second Council of Lyon in 1274. After 1275, he was involved in a dispute with the bishop of Tortosa that took him to Rome. He spent his last five years in Italy.