The Oblates of Saints Ambrose and Charles (Latin: Congregatio Oblatorum Sanctorum Ambrosii et Caroli) is an Ambrosian association of lay people and secular clergy in the Roman Catholic Archdiocese of Milan.
It was founded as the Oblates of St Ambrose in Milan in 1578 by archbishop Carlo Borromeo, inspired by the Oratorians, although he had begun preparing for the establishment of the association as early as 1570.
This formed a body of well-trained and willing volunteer oblates who the bishop could use for emergencies and other difficult tasks, principally heading seminaries and carrying out popular missionary preaching.
After a trial period of two years and a commission called by Filippo Neri and Felice da Cantalice, the oblates' rule was promulgated on 13 September 1581.
Napoleon I suppressed it in 1810 and after his fall cardinal Carlo Gaetano Gaisruck opposed reviving it.