St. Giovanni Battista de' Rossi (†1764) was an Italian Roman Catholic priest. He served as the canon of Santa Maria in Cosmedin after his cousin, who was a priest serving there, died. He was a popular confessor despite his initial fears that his epileptic seizures could manifest in the Confessional. Rossi opened a hospice for homeless women not long after his ordination, and he became known for his work with prisoners and ill people, to whom he dedicated his entire ecclesial mission. The cause for canonization began under Pope Pius VI on 27 June 1781 but suffered brief though significant setbacks due to the French Revolution and the ensuring Napoleonic Wars and Revolutions of 1848. Rossi was beatified after Pope Pius IX attributed two miracles to his intercession on 7 March 1859 and presided over the celebration in Saint Peter's Basilica on 13 May 1860. On 8 December 1881 the acknowledgement of two more miracles enabled Pope Leo XIII to canonize him as a saint of the Roman Catholic Church. His feast day is celebrated on 23 May.