Sebastian Valfrè was a Catholic priest and a member of the Oratory of Saint Philip Neri. He is called the Apostle of Turin for his long years of service to the people of that city, where he served as the provost of the local Oratory for many years.

The Confederation of Oratories of Saint Philip Neri, abbreviated C.O. and commonly known as the Oratorians, is a Catholic society of apostolic life of pontifical right for men who live together in a community bound together by no formal vows but only with the bond of charity.