Stefano da San Gregorio

Stefano da San Gregorio was an Italian mathematician and theologian of the seventeenth century who belonged to the Order of Discalced Augustinians. His Aritmetica pratica, a practical arithmetic in Italian, was printed at Ferrara by Francesco Suzzi in 1642. He also wrote in Latin on theology: De praecipuis iuris et iustitiae partibus, on the principal parts of law and justice, appeared at Ferrara in 1643, and De divinae pietatis vinculis, on the bonds of divine piety, at Milan in 1668. The English Wikipedia article gives no dates of birth or death for him.