The Society of Priests of Saint-Sulpice, also known as the Sulpicians, is a society of apostolic life of Pontifical Right for men, named after the Church of Saint-Sulpice, Paris, where it was founded. The members of the Society add the nominal letters PSS after their names to indicate membership in the Congregation. Typically, priests become members of the Society of the Priests of St. Sulpice only after ordination and some years of pastoral work. The purpose of the society is mainly the education of priests and to some extent parish work. As their main role is the education of those preparing to become priests, Sulpicians place great emphasis on the academic and spiritual formation of their own members, who commit themselves to undergoing lifelong development in these areas. The Society is divided into three provinces, operating in various countries: the Province of France, Canada, and the United States.

The Church of Saint-Sulpice is a Catholic church in Paris, France, on the east side of Place Saint-Sulpice, in the Latin Quarter of the 6th arrondissement. Only slightly smaller than Notre-Dame and Saint-Eustache, it is the third largest church in the city. It is dedicated to Sulpitius the Pious. Construction of the present building, the second on the site, began in 1646. During the 18th century, an elaborate gnomon, the Gnomon of Saint-Sulpice, was constructed in the church.