The original palace was built in the first half of 18th century for Michał Bieliński, voivode of Chełmno; its architect was Jozef II Fontana.

[2] It represents the characteristic type of baroque suburban residence built entre cour et jardin (between the entrance court and the garden).

[4] The palace also features a unique sewers system from the turn of the 19th and 20th centuries, which made it possible for the owners of the property to have access to some of the earliest modern bathrooms in Europe.

[5] In 1903, the Kozłówka entail was established by Tsar Nicholas II of Russia, which meant that the property belonging to the Zamoyski family could not be sold or divided and automatically passed by law to the eldest heir.

From November 1944, when the last owners Count Aleksander Zamoyski and his wife Countess Jadwiga Zamoyska were forced to flee their palace, it became the property of the Communist regime, whose grip on Poland ended in 1989.