From 1674 this palace and the nearby Ujazdów Castle belonged to Prince Stanisław Herakliusz Lubomirski, who commissioned a Baroque bath-house, or "Łazienka", named similarly to a number of other European historic sites, including England's city of Bath.

In 1766 King Stanisław August Poniatowski purchased the estate and converted the bathing pavilion into a classicist summer residence with an English garden.

During the final stages of World War II, the retreating Germans devastated the interior of the Palace and drilled holes in the structure in preparation for destruction with explosives.

[1] After 1678 the Lubomirski palace complex in Warsaw's Ujazdów district was enhanced with four park pavilions: Arcadia, Hermitage, Frascati, and the largest, the Bath-house.

[1] The façades and interiors were decorated with sculptures, reliefs, Latin inscriptions (e.g., "Musa Dryas, Nymphaeque boves et Pastor Apollo / Hic maneant, fugiat diva Minerva domus" – "Muse, dryad and nymphs, bullocks, and Apollo the shepherd let stay here / divine Minerva let disdain this house", on the portal of the southern façade), and the Lubomirski coat of arms, Szreniawa.

The façades are unified by an entablature carried by giant Corinthian pilasters that link its two floors and are crowned by a balustrade that bears statues of mythologic figures.

On the palace's ground floor is the Bacchus Room, decorated with 17th-century Dutch blue tiles and a painting by Jacob Jordaens depicting Silenus and Bacchantes.

Also on the ground floor is the Dining Room in which the famous Thursday Dinners took place, to which King Stanislaus Augustus invited leading Freemasons and other notables of the Polish Enlightenment.