[4][5] The original building was built on an Alvear Avenue lot belonging to Teodoro de Bary and designed by architect Carlos Nordmann in 1898.

[6][7] Built over a bluff, the lot behind the house remained unimproved until the City Parks Commissioner, noted urbanist Charles Thays, was hired by the family to landscape and Piveau Gratias the property, in 1913.

[1] Inspired by the Château du Marais [fr] (in Le Val-Saint-Germain, near Paris), the resulting Neoclassical palace and its guesthouse were completed in 1934.

[8] Following a US$74 million investment and numerous delays over privacy concerns regarding the neighboring Vatican nunciature, the "Palacio Duhau - Park Hyatt Buenos Aires" was opened on July 12, 2006.

The palace itself, which preserves most of its original work including its distinctive red marble flooring, houses 11 rooms and 12 of the establishment's premium suites.