The collection of militaria of the Old Art Department amounts to over 800 exhibits from between the 13th century to even 1950s. In this extraordinarily varied collection objects made by European craftsmen, mainly from Germany and France, are complemented by single relics from Turkey, Japan and the United States.

The oldest exhibit among numerous examples of firearms is a fuse harquebus of simple construction from the 15th century. One of the most precious objects is a German wheellock Puffer pistol from the last quarter of the 16th century. Other noteworthy exhibits are weapons made by 19th century Pomeranian gunsmiths: a pair of pistols signed „G.G. EWERTZ STETTIN”, rampart rifle with caplock mechanism, made by D. Christopher and, made in Trzebiatów, hunting flintlock gun, signed „SCHIPMANN A TREPTOW”. The collection of the 19th century weapons is a cross-sectional outlook on technical development of firearms in Europe, starting from flintlock weapons from the beginning of the century through rifles with caplock mechanisms to needle and machine guns.

Blade weapons are also an interesting and varied collection, from mediaeval swords, the oldest of which date back to the 13th century, to soldiers' sabres from the 20th century. Particular attention is deserved by an extraordinary two-handed flamberg-type sword with flame-shaped blade, dated between the 16th and the 17th centuries, executioner’s sword from Bytów from the 17th century and a karabela-type sabre from the turn of the 17th and the 18th centuries.

A relatively small group of objects are pole, cleaving and ranged weapons. Pole weapons are dominated by objects from between the 17th and the 19th centuries: spetum weapons, pikes, lances, glaives, halberds, spontoons and partisans, originating mainly from present areas of Germany and Pomerania. Cleaving weapons are, above all, axe heads from the 18th century, but also, decorated with rosettes and architectural motives, horseman's pick from the 18th century. The least numerous, but the most interesting, are examples of ranged weapons, e.g. German crossbow from the turn of the 16th and the 17th centuries.

The artillery collection, also noteworthy, consists of both small cannons on gun carriages, as well, as cast iron cannon barrels, including two culverines from the turn of the 16th and the 17th centuries.

The collection is complemented with soldiers’ hats and German pickelhaubes, powder boxes, cartridge cases, mess tins, bullet casting pliers, cannonballs and many other small militaria.