Polish army Museum in the Arsenal – Museum located in the former military Arsenal in samosa. The Museum was opened in 1984 as a branch of the Zamoyski Museum.

Arsenal is a former Armory in the Old Town, was built in the late 16th century in the vicinity of the Zamoyski Palace. Jan Zamoyski, the founder of city and Arsenal, collected the spoils of war, brought from numerous expeditions. After a devastating fire in 1658, the Arsenal was rebuilt in the classical style. The length of the building reached 60 meters, the second floor was built in the first half of the 19th century. Arsenal is one of the few remaining in Poland military installations of this type.

The exposition of the Museum occupies two floors. The ground floor houses two permanent exhibitions: "the Arsenal of Jan Zamoyski and the History of the city fortress from 1580 to 1866. Collection of Jan Zamoyski contains many interesting exhibits: guns, guns, antique firearms, military uniforms. Temporary exhibitions are housed on the second floor of the Arsenal.

In 2011, the first summer exhibition was held under the open sky, where there were weapons of WWII: tank T-34, Mi-2, combat vehicles, aircraft "spark" and guns. The exhibition was a great success, after which it was decided to organize it every year in the summer months from may to October.

In 2012 started the construction of an additional exhibition hall for the Museum of the Polish army.