Girolamo Gastaldi (1616âÂÂ1685) was a Roman Catholic cardinal. He is notable for commissioning the "twin" churches of Santa Maria dei Miracoli and Santa Maria in Montesanto in Rome.
On 12 May 1680, was consecrated bishop by Girolamo Boncompagni, Archbishop of Bologna, with Carlo Molza, Bishop of Modena, and Augusto Bellincini, Bishop of Reggio Emilia, serving as co-consecrators.
He is known for his treatise on the political and legal measures taken to control the plague, Tractatus de Avertenda et Profliganda Peste, Politico-Legalis, published in 1656.