The Jerzy Dunin-Borkowski Museum in Krośniewice, housed in a former inn dating back to 1803, is a museum institution that originated from the private collection of the collector Jerzy Dunin-Borkowski. Its history dates back to the 1950s when Dunin-Borkowski began exhibiting his works in the so-called Museum Above the Pharmacy. In 1978, after donating his collection to the nation, the museum became a branch of the National Museum in Warsaw, and the collector became its lifelong curator. The museum boasts a rich collection of approximately 15,000 items, which reflect Dunin-Borkowski's passions and interests. The exhibition is divided into five sections, encompassing not only art collections but also memorabilia related to the collector's family and important historical figures, such as General Władysław Sikorski. The exhibition includes the collector's study with paintings and family mementos, the General Sikorski Room, a portrait hall featuring 18th-century works, a Biedermeier-style salon with a collection of miniatures, and the collector's passions, which include furniture, militaria, silverware, and clocks. Interestingly, the collector gathered various items related to prominent Poles, allowing visitors to explore Polish history and its distinguished representatives. The museum is not only a treasure trove of local culture but also a significant site for the study of art and history, serving as a monument to the passion of a man who devoted himself wholeheartedly to collecting.