Analysis of information sources in references of the Wikipedia article "Piarists" in English language version.
[...] the Collegio Nazareno, the college founded by Saint José de Calasanz (1557-1648), which opened in 1630 thanks to the generous legacy left by Cardinal Michelangelo Tonti (1566-1622).
[...] the Piarists were born as a religious order especially dedicated to the primary education. [...] Only a few years after its founder's death in 1648, Pope Alexander VII restored the scuole pie (pious schools) and [his] successor Pope Clement IX fully backed them in[...] their role as religious orders.
Joseph Calasanz was the man whom in 1948 Pope Pius XII named as patron saint of Christian schools.
