The largest group of buildings at North Head Sanctuary, Manly, is the Parade Ground Precinct, a collection of Art Deco buildings arranged around an impressive parade ground built in 1936. Many of these buildings were built as part of the original North Head Artillery Barracks, and were used by School of Artillery from the mid 1940s. The North Head Artillery Barracks are recognised as having significant Commonwealth Heritage values: the Barracks illustrate the implementation of Defence policy in the inter-war years before the onset of WWII in 1939.