Trinità dei Monti
Nebbia helped paint galleries in Vatican libraries including the ceilings of map gallery. During the papacy of Clement VIII he designed the pendentive mosaics depicting the Evangelists Matthew and Mark for St. Peter's Basilica. He painted a "Crucifixion" for Borghese chapel in the church of Trinità dei Monti. He painted a "Resurrection" for San Giacomo degli Spagnoli. He painted a "Coronation of the Virgin" for the church of Santa Maria dei Monti.