FERRI, CIRO (1634-1689), Roman painter, the chief disciple and successor of Pietro da Cortona. He was born in the Roman territory. At an age a little past 3o, he completed the painting of the ceilings and other internal decorations begun by his in structor in the Pitti palace, Florence. He also co-operated in or finished several other works by Pietro, both in Florence and in Rome. Of his own independent productions, the chief is an ex tensive series of scriptural frescoes in the church of S. Maria Maggiore in Bergamo; also a painting (rated as Ferri's best work) of St. Ambrose healing a sick person, the principal altarpiece in the church of S. Ambrogio in Rome. He executed also a large amount of miscellaneous designs, such as etchings and fronds pieces for books ; and he was an architect besides. Ferri was ap pointed to direct the Florentine students in Rome, and Gabbiani was one of his leading pupils. He died in Rome on Sept. 13, 1689.