Marion Mahony (1870–1961) was that rare commodity in late nineteenth-century American society: a woman functioning as an equal in a professional world dominated by men. Born to progressive parents, and a household and wider circle of strong and socially engaged women, Marion Lucy Mahony was only the second woman to graduate from an American university (Massachusetts Institute of Technology, 1894) with a full degree in architecture, and the first to be licensed to practise under any state regulatory structure anywhere in the world (Illinois, 1898).