Palais Lamberg, Protected historical palace in Innere Stadt, Austria.

The Palais Lamberg at Wallnerstraße 3 is a protected palace in the Innere Stadt with a refined facade showcasing classical design elements. The building was created by joining two earlier houses and features stonework crafted by Master Wolfgang Steinböck using locally sourced materials.

Landmarschall Ferdinand Maximilian Count Sprinzenstein bought two separate houses on the site around 1668 and had them rebuilt into the present palace in 1675, with a richly furnished interior. In 1730 Carl Joseph Count Lamberg-Sprinzenstein had it remodelled to plans by Joseph Emanuel Fischer von Erlach. The Lamberg family sold it in 1740 to Franz I Stephan of Lorraine, husband of Maria Theresia, and from 1765 it passed to Emperor Joseph II, who sold it to Prince Franz Ulrich Kinsky.

The festivity hall preserves ornate stucco work, gilded vases, and a marble fireplace from 1855 that reveal the interior design preferences of Austrian nobility. These elements show how the wealthy lived and decorated their homes during the 19th century.

The palace is owned by Donau-Finanz GesmbH & Co. KG and serves as an office building, so interior visits are not open to the public. After the patent office moved out in 2003, the second and third floors were restored by architect Harald Mallner with the Federal Monuments Office and the Austrian Restorers' Association. The show facade on Wallnerstraße largely dates from 1846 and can be viewed from the street.

The palace's name Kaiserhaus dates from the 1740s, when Franz Stephan of Lorraine, husband of Maria Theresia, used it for private meetings and financial transactions. Later owners included the Czernin family, who kept their painting gallery here from about 1800 to 1845 before moving it to Palais Czernin in the Josefstadt.