Australia Square

Australia Square Virtual Tour

Australia Square is an enduring icon of Sydney’s skyline. Designed by renowned architect Harry Seidler, Australia Square is the pinnacle of success, offering customers an environment filled with beauty, life and light. View our Australia Square Virtual Tour below.

It established new principles in design and construction through its distinctive circular form and the creation of a large public open space at ground level. The public space is established by a plaza that is set above street level and steps down throughout the site.  The piazza area include cafes, fountains, artwork (Le Corbusier tapestries, Calder Sculpture).

The structural system was developed with one of the world’s leading engineers, Pier Luigi Nervi, and features technological advances of the time such as patterned ribbing and tapering exterior columns in quartz faced pre cast concrete as permanent formwork. The tapering columns add emphasis to the height of the tower further emphasising its elegance. At the time it was built in 1961 – 1967 the tower was the world’s tallest light weight concrete building. The circular form was structurally extremely efficient and the consistency of floor plan, the use of precast facade and in situ core lead to floors being erected in 5 working days which set new standards in office tower construction.

Australia Square History


30 buildings on the site were demolished to make way for the tower building, plaza building, public plaza, retail complex and carpark.



On its completion, Australia Square became Sydney’s first skyscraper and the world’s tallest lightweight concrete building. It established new principles in design and construction, breaking records and setting a new benchmark in office tower construction. The structural system, developed by one the world’s leading engineers, Pier Luigi Nervi, featured technological advances at the time.



Harry Seidler commissioned a sculpture for Australia Square by renowned American sculptor, Alexander Calder. Crossed Blades has become a striking established feature of the building’s plaza area described by Seidler as an “open but contained space” like the town square in a medieval city. The plaza continues to be widely recognised as a precursor to the concept of civic space on private land.



A mural by celebrated New York artist Sol LeWitt was commissioned in 2003 by Harry Seidler to showcase international works of art at Australia Square. The mural replaced the lobby’s original tapestries by Le Corbusier and Vasarely. Penelope Seidler said her husband originally planned a mural on the walls of the circular ‘drum’ housing the tower building’s services but could not find a suitable one, so settled on the tapestries.


Australia Square Virtual Tour