A neo-Gothic brick observation tower built on an octagonal floor plan. Originally, the tower had three floors and was crowned with an observation terrace. Before 1945, the tower offered panoramic views of the city and the nearby Lower Silesian Forest. Its origins date back to the second half of the 19th century. The construction of the tower was initiated by Etienne Doussin, the owner of Folwark Próg (Drüssel) and the districts located several hundred meters south. The building was erected in the spring of 1873 and opened on June 22 of the same year. The founder's initials and the year "ED 1873" can still be seen above the entrance. Doussin named the tower "Jenny Tower" in honor of his wife. Interestingly, the builder also had a daughter of the same name, born in 1874. Jenny von Bary-Doussin was one of Bolesławiec's most prominent artists.