Willem Marinus van Rossum, C.Ss.R. was a Dutch prelate of the Roman Catholic Church. He was made a cardinal in 1911, led the Apostolic Penitentiary from 1915 to 1918, and served as Prefect of the Congregation for the Propagation of the Faith from 1918 until his death.

The Congregation for the Evangelization of Peoples was a congregation of the Roman Curia of the Catholic Church in Rome, responsible for missionary work and related activities. It is also known by its former title, the Sacred Congregation for the Propagation of the Faith, or simply the Propaganda Fide. On 5 June 2022, it was merged with the Pontifical Council for Promoting the New Evangelization into the Dicastery for Evangelization.