 He preached at first in the great cathedrals, and then for twenty-seven years (1665–92) gave popular missions with an eloquence surpassed only by his holiness.His "Quaresimale" (Florence, 1679, tr.New York, 1874) was read and admired by Antonio Pignatelli, who as Pope Innocent XII summoned the missionary to preach before him, and made him theologian of the "Paenitentiaria".