Opus Sanctorum Angelorum ('Work of the Holy Angels'), more commonly known as Opus Angelorum ('Work of the Angels'; German: Engelwerk), is a movement within the Catholic Church that promotes devotion to angels, based on the alleged private revelations of Gabriele Bitterlich.
The Holy See recognized it in 2010 as in full conformity with the Church's teaching, after a period in which controversy led to it being placed under the oversight of a Dominican priest in 1992.