One of the building in St. Mary’s Canossian College, St. Michael Building, ( which also named as Old building) was listed as Grade II historic buildings in Hong Kong in 1991. In 2010, the Main building and St. Michael Building were both confirmed to be Grade I historic buildings in Hong Kong. Other Catholic buildings, like the Rosary Church and the St. Mary's Canossian School, are adjacent to the school. St Mary's is also a band 1 school, leading top 10 in Hong Kong.