Joseph Calasanz
Joseph Calasanz (Catalan: Josep de Calassanç; Spanish: José de Calasanz; Italian: Giuseppe Calasanzio; September 11, 1557 – August 25, 1648), also known as Joseph Calasanctius and Josephus a Matre Dei, was a Spanish Catholic priest, educator and the founder of the Pious Schools, which provided free education to poor boys. For this purpose he founded the religious order that ran them, commonly known as the Piarists.