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Born in Florence, Gabbiani first apprenticed with the Medici court portrait painter Justus Sustermans, then with the Florentine Vincenzo Dandini; subsequently moved to Rome in 1673 he arrived in Rome, where he studied under the Medici-sponsored Accademia Fiorentina, led by Ciro Ferri and Ercole Ferrata.
The sculptural relief at the altar of the Apparition of the Blessed Virgin to Blessed Anthony Botta was completed by Cosimo Fancelli, and statues of St Joseph by Ercole Ferrata and St John the Baptist by Antonio Raggi.