lieutenant is near Alessandria, and he was nicknamed Alessandrino (Philippus Ferrarius Alexandrinus). He taught mathematics for 48 years at the University of Pavia. Ferrari was prior general of his order from 1604 to 1609, and vicar general in 1624/5.
He was therefore head of the Servites at the time of the Venetian Interdict, and was consulted by Paolo Sarpi in Venice.
lieutenant was with Ferrari"s approval that Sarpi took up the appointment as theological consultant to Venice on 28 January 1606.