A product of a rigorous design process from Australian architecture firm Yuncken Freeman Architects in 1962, the building undertook a two-year construction period and in 1965 it was first opened revealing a 70 metre high 18-storey structure.

[1] The building uses a curtain wall façade system in conjunction with precast concrete clad panels finished in reconstructed black granite.

The precision and intelligence of the design allowed the glazing system to be installed so that from the exterior no suspending frame is visible, giving the building a seamless, sleek and polished finish.

[2] The AON Centre was influenced by the classical formalism of Mies van der Rohe and Skidmore, Owings & Merrill, in particular Yuncken Freeman drew upon Mies Van Der Rohe’s Federal Center in Chicago (1964) in a more formalised manner the Seagram Building, New York (1958) was also used as inspiration.

[3] The dark cladding of the building gives it the distinctive Yuncken Freeman look, which is notable in some of the firm’s other works such as the Flagstaff House at 411—415 King Street, Melbourne, Australia (1968).