Military Museum of Chaves is located in the tower Keep is the surviving part of the town's castle.

Chaves is a city and an eponymous municipality, which is located 10 km from the Spanish border and 22 km South of the Spanish city Verin. The municipality of Chaves ranks second in population in the district of Vila real, and the town was founded in 1258. On the territory of the city has many monuments of the middle Ages, which attract attention, and among these it is worth noting the tower Keep. The main tower, some of the walls and the garden is all that remains of the medieval castle.

The castle of Chaves was built in the XIV century by king Dinis I of a Farmer, and during the Reconquista, when there was an active struggle for land in the Iberian Peninsula between the Moors and Christians, performing a protective function. The castle was built in the highest part of the city, today is the historic center and pedestrian area of Chaves. The surviving tower of the Keep has a square shape, the top of the tower is equipped with loopholes. The tower has a height of 28 meters, which is equal to the height of the four houses. In 1938 the castle was inscribed on the list of national monuments of Portugal the values.

Inside the tower today is the Military Museum of the city of Chaves. The Museum occupies six floors. Among the exhibits there are military uniforms, armor, weapons, flags, ranging from the middle Ages up to modern time. Weapons and armor of the middle ages is mainly represented on the first two floors, the exhibits on the upper floors will talk about the participation of Portugal in the First world war and colonial wars in Angola and other countries. Also has a hall which presents various military documents.