The admin building (now known as the Centenary Block) celebrated its 50th anniversary in 2013, having been officially opened by then Prime Minister Robert Gordon Menzies KT CH QC MP on 20 October 1963. It was designed by well-known architectural firm Hennessy & Hennessy, who were responsible for the design of many Catholic school and church buildings throughout Sydney. The lower supports of the statue of Our Lady can just be seen in the top right pf the photograph. Together, the statue and building form a prominent landmark on the highest point in the Eastern Suburbs.