In 1911 Australian Minister for Home Affairs King O’Malley approved an international design competition for the federal capital, reserving the right to make the final decision of the winning plan.
The competition attracted strong interest, leading O’Malley to extend the deadline to February 1912. By the time the closing date arrived, 137 entries had been received. In March 1912, O’Malley established the Federal Capital Designs Board to assess the entries.
On 23 May 1912, O’Malley announced that entry number 29 was the winner. The winning entry was that of Walter Burley Griffin and his wife Marion Mahony Griffin from Chicago.