The first and largest fortification of the former fortress city of Koenigsberg considered Fort №3 named after Emperor Frederick III. With erected in 1879 construction began on the fort of twelve major fortifications belonging to Fortova Zone "Night feather Koenigsberg." The original name of Fort №3 was "Kvednau", later the construction was given the name Friedrich Wilhelm I, and in 1894 was renamed in honor of Frederick III.

Fort №3 is an elongated hexagon surrounded by a dry moat. In the central building housed the barracks, kitchen, dining room, infirmary, warehouses of food and ammunition, boiler room and auxiliary facilities. On both sides of buildings located courtyards serving his time transportation. All the rooms of the fort are connected Poterna and between floors - screw and stairway. Defensive structures has underground casemates with vaulted ceilings from high (repeatedly fired) ceramic bricks. The architects of the building was provided complete life support in the form of natural ventilation, water supply, power supply, sewage and heating systems by heating within the channel walls.

During the storming of Königsberg (1945), Fort Frederick III received minor damage in the postwar years was used as a warehouse of military equipment and ammunition. In March 2007, the fortification has received the status of cultural heritage (regional level).

Fort №3 is considered one of the best preserved historical fortifications kind of Kaliningrad. Today, in the central building of the historic buildings are carried out reconstruction work, and after in underground dungeons researchers have found the exhibits "Prussia" (disbanded before World War II), the fort excavations. Found items (more than 10,000) are on display History and Art Museum.