The Palace on the Isle, also known as Baths Palace, is a classicist palace in Warsaw's Royal Baths Park, the city's largest park, occupying over 76 hectares of the city center.
From 1674 the property and the nearby Ujazdów Castle belonged to Count Stanisław Herakliusz Lubomirski, who commissioned a Baroque bath house called "Łazienka", similarly to a number of other European historic sites, including England's city of Bath. The building, erected on a square plan, was richly decorated with stuccos, statues, and paintings; some of the original decorations and architectural details survive.
In 1766 King Stanislaus Augustus purchased the estate and converted the bathing pavilion into a classicist summer residence, with an English garden.
Wikipedia https://en.wikipedia.org/wiki/Palace_on_the_Isle
Official Website https://www.lazienki-krolewskie.pl/
Coordinates 52°12'54.276" N 21°2'8.883" E