Fort III (Fort Pomiechówek) is one of the forts of the Modlin Fortress, constructed between 1883 and 1888 as the largest fort in the complex, modeled on the "F1879" design. Located on a hill in Pomiechówek on the right bank of the Wkra River, the fort was designed for defense, and to this day, its brick barracks and the neck caponier remain in good condition. The architecture of the fort evolved over the years, and the facility underwent modernization, resulting in the construction of a modern counterscarp caponier and interval traditors. From a historical perspective, the fort played an important role during World War I, serving as a site of Russian resistance against the German offensive in 1915. During World War II, in 1939, the fort was incorporated into the Polish defense, and after the fall of the Modlin Fortress, it was used as a prison for its defenders. Between 1941 and 1945, it housed a Gestapo penal and investigative prison, where brutal repressions were carried out against the inhabitants of the Ciechanów Regency. Currently, the fort is managed by the Military Property Agency and can be visited in organized groups, making it an interesting tourist attraction, especially for enthusiasts of history and military architecture. Fort III is a place that combines rich historical and architectural heritage, bearing witness to important events in Polish history.