The Myślewicki Palace in Warsaw's Royal Łazienki Park was built in the years 1774-1779 on behalf of Stanisław August Poniatowski according to a design by Dominik Merlini. Initially, it was inhabited by royal courtiers, and then by Prince Józef Poniatowski. In the interwar period, it was the seat of, among others, Bolesław Wieniawa-Długoszowski and Eugeniusz Kwiatkowski.
The palace survived World War II and later served as a guest residence of the government, hosting world leaders. In the years 1958-1970, secret talks between the ambassadors of the USA and China were held here, which led to the establishment of diplomatic relations. In 1980, the building was taken over by the Royal Łazienki Museum, and its renovation was completed in 2015.
The palace is distinguished by its original 18th-century painted decor, including polychromes by Antoni Herliczka and landscapes by Jan Bogumił Plersch. One of only two 18th-century bathrooms in Poland has been preserved here, connected by a secret staircase to a bedroom, probably used by Stanisław August Poniatowski.