 Francesco Maria Annoni was born in Milan, Italy in 1610 and ordained a priest in the Congregation of Clerics Regular of the Divine Providence.On 21 June 1660, he was appointed during the papacy of Pope Alexander VII as Bishop of Muro Lucano.On 27 June 1660, he was consecrated bishop by Giulio Cesare Sacchetti, Cardinal-Bishop of "Sabina", with Lorenzo Gavotti, Bishop Emeritus of Ventimiglia, and Giovanni Agostino Marliani, Bishop Emeritus of Accia and Mariana, serving as co-consecrators.