 St Mary's Cathedral College, located adjacent to the cathedral, was founded in 1824 and is a secondary day school that caters for approximately 750 boys from Years 5 to 12 and is administered by the Congregation of Christian Brothers.St Mary's Cathedral Choir, the oldest musical institution in Australia, is formed of approximately 40 choristers and sings at High Mass every Sunday and on special holy days.The following individuals have been elected as Archbishop of Sydney, with a number elected as cardinals, as well as receiving civilian honours.