Pietro Casani was an Italian Roman Catholic priest and a professed member of the Piarists. He became an assistant and a close personal friend of Giuseppe Calasanz. Casani had assumed the religious name of "Pietro della Natività di Maria" upon his solemn profession and had once been part of the Congregazione della Beata Vergine Maria that Giovanni Leonardi founded.

10-17

8 September 1570

1647-10-17

beatified

10

17