St. Vincent Pallotti (1795–1850) was a Roman priest who spent his entire ministry in the city of his birth. He founded the Pious Society of the Catholic Apostolate in 1835 — the Pallottines — and was one of the earliest theologians of the universal lay apostolate, anticipating the Second Vatican Council's emphasis on the role of the laity by over a century. He worked tirelessly among Rome's poor, founded the Epiphany Octave (still observed at the Roman church of San Andrea della Valle), and was the confessor of saints including St. Gaspar del Bufalo.
He died on January 22, 1850. His body was exhumed in 1906 (56 years after death) and again in 1950 in connection with his canonisation; both times the body was found substantially preserved. He was canonised by Pope John XXIII on January 20, 1963 — one of the last canonisations before the Council. His body is now displayed in a glass-fronted reliquary beneath the main altar of the small Roman church of San Salvatore in Onda, near the Tiber.