Hennessy & Hennessy

Hennessy & Hennessy was an architectural firm established in 1912 in Sydney, Australia that was responsible for a series of large scale office buildings in the 1930s in all capital cities in Australia, as well as New Zealand and South Africa, designed by John (Jack) Hennessy (1887–1955), described as Australia's first international architect.

The firm was also responsible for many projects for the Catholic Church in Brisbane in the 1920s, including the never-built Holy Name Cathedral, Brisbane, which would have been 'the largest sacred building in the Commonwealth'. They were also the architects for the Great Court of the University of Queensland in Brisbane.