Just a few months later, the University of Dayton had its beginnings on July 1, 1850, when St. Mary's School for Boys opened its doors to 14 primary students from Dayton. In September, the first boarding students arrived and classes moved to the mansion. Five years later, the school burned to the ground, but classes resumed within months. By 1860, when Brother Zehler became president, the enrollment was nearly 100 students. The Civil War had little direct effect on the school because most of the students were too young to serve. College preparatory classes started in 1861 along with a novitiate and school for Marianist candidates. The school would become Chaminade High School, named after the order's founder William Joseph Chaminade, which has since merged with the all-girls Julienne High school run by the Sisters of Notre Dame de Namur to form the co-educational Chaminade-Julienne High School.