Palais Hoyos is an Art Nouveau building in the Landstraße district of Vienna, Austria.
The style of the Historicism was pursued during the realisation of the palace and the facade is Rococo and Vienna Secession (Art Nouveau).
The site once housed the Trinity hospital and the barracks of the k. k. adelig-polnischen Leibgarde military unit, which were called the Arcièren-Leibgarde later on.
In 1957, the palace in Rennweg was sold by the Hoyos family to Yugoslavia, in order to serve as its embassy in Austria.
Following the agreement of Yugoslav successor states on the distribution of former country's foreign assets in 2011, the building passed on to Croatia.