Polish Army Museum in the Arsenal - Museum, located in a former military arsenal in Zamosc. The museum was opened in 1984 as a branch of Zamoyski Museum.

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

The museum exposition occupies two floors. On the first floor there are two permanent exhibitions: "Arsenal Jan Zamoyski" and "History of the fortress city from 1580 to 1866". Jan Zamoyski collection contains a lot of interesting exhibits: machine guns, cannons, old weapons, military uniforms. Temporary exhibitions are located on the second floor of the Arsenal.

In 2011, the first year was held open-air exhibition, where it was represented by weapons since World War II: Tank T-34, Mi-2, combat vehicles, aircraft "Iskra" and guns. The exhibition was a great success, after which it was decided to hold it every year in the summer months from May to October.

In 2012, construction began on an additional exhibition hall for the needs of the Museum of the Polish Army.