a painter of the 17th century, was a native of S. Sepolcro, Tuscany. He achieved a high reputation at home, and his fame extended as far as Rome. Two of his historical frescos, representing Our Lady, are in S. Chiara; and at S. Lorenzo there is a picture of the titular, with other saints. In the Guides to Venice and Rome several of his works are mentioned; and in that of Leghorn, the only picture in the cathedral esteemed worthy of notice is that of the Five Saints, painted by Mercati with great care. See Lanzi's History of Painting, transl. by Roscoe (London, 1847, 3 vols. 8vo), 1:255.