spend the next 125 years on the institution's South Orange campus. Until 1928, the President of Seton Hall College was also the head of the Preparatory Division. At that time, Rev. D.A. Mulcahy became the high school's first director. The following year, Rev. William Bradley was named director, then principal, and ultimately the school's first headmaster in 1938. The prep school's population grew further over the next decades, with peaks in enrollment during World War II and in the mid 1970s. The school occupied three main buildings on the university campus: Mooney Hall, Duffy Hall, and Stafford Hall. A significant portion of the student body lived on campus until the last of the boarding students graduated in the mid-1950s. In the early and mid twentieth century Prep drew its students principally from Essex and Union counties, but as the state's transportation system expanded in the 1960s and 1970s, the school began to draw students from Morris, Bergen, Hudson, Passaic and Middlesex counties. This led to growth in the number of students attending the school — in 1975, enrollment surpassed 1,100. In 1980, Rev. Michael E. Kelly became the first alumnus headmaster. Five years later, the Prep acquired an campus of its own in nearby West Orange. Expansion continued to be a priority for the Prep as the 21st century arrived. In 1993, the school purchased a tract of land on nearby Prospect Avenue, overlooking the New York City skyline. Seton Hall Prep broke ground for construction of the Edward D. and Helen M. Kelly Athletic Complex (KAC) on this site in 1999. The project would span several years; the final phase of construction would not begin until 2014. In 2013, the John J. Murphy '52 Science Center was opened, adding a new wing of classrooms and science labs to the school. In 2014, Rev. Kelly became the school's first president. Rev. Msgr. Robert Harahan was appointed headmaster in his place. In 2015, as the now-open KAC was being completed, the school celebrated its 160th anniversary. In 2019, alum Michael Gallo, class of 1979, was appointed as the first lay headmaster. Prep life The Prep offers a co-curricular activities program, with numerous academic, service, performance, cultural, publication, and recreation clubs and activities. Additionally, the Prep offers 16 varsity sports, most with accompanying sub-varsity level teams. The school reports that around 70% of its students participate in athletics at some point during