In 1845 Don John Bosco ("Don" being a traditional Italian honorific for priest) opened a night school for boys in Valdocco, now part of the municipality of Turin in Italy. In the following years, he opened several more schools, and in 1857 drew up a set of rules for his helpers. This rule was approved definitively in 1873 by Pope Pius IX as the Rule of the Society of Saint Francis de Sales. The Society grew rapidly, with houses established in France and Argentina within a year of the Society's formal recognition. Its official print organ, "Salesian Bulletin," was first published in 1877.