Blessed Marianna Fontanella (7 January 1661 – 16 December 1717) – in religious Maria degli Angeli – was an Italian Roman Catholic professed religious from the Discalced Carmelites.
Fontanella studied with the Cistercians as a child and entered the Discalced Carmelites despite the protests of her mother and siblings – she soon became a noted abbess and prioress and in 1703 inaugurated a new convent she herself oversaw the establishment of.Her beatification cause commenced under Pope Innocent XIII in 1722 and she was titled as Venerable in 1778 under Pope Pius VI.
Her beatification received ratification in 1865 under Pope Pius IX.