The Mount St Mary ACU campus provides a rare showcase of the development of practice and changing architectural styles by a single architectural firm between 1908 and the 1960s: the substantial additions to Mount Royal (now the Edmund Rice Building), the Barron Memorial Chapel (which is listed in the Australian Institute of Architects Twentieth Century Register of Significance), the Mullens Building, the brick arcades and the Scholasticate (now part of the Brother Stewart Library).