Gate MARSCHIERTOR (in German: "Main gate") is located in Aachen and represent two round four-storey towers, which are integrated five-story building with arched gates. Gate MARSCHIERTOR – second after the gate Ponttor, preserved from the old Aachen city wall. The construction of the gate was begun in 1257, the exact completion date is unknown. Together with the gate Ponttor, Cologne gate and a gate Jacob, MARSCHIERTOR was the main gate of the defensive ring of the city walls, built in the XIV-XV centuries.

Gates have a width of 23, 8 meters, height of arch on the South side of the gate is 13 metres and North – 8, 5 m, total height of the gate with a spire – 48, 9 meters. Spiral staircases in each tower leading to the Armory hall, which is located in the Central building. On the ground floor there were rooms for guards and cameras for prisoners.

At different times the gate MARSCHIERTOR and adjacent rooms were used differently. Initially it housed the city garrison, and behind the gates was the parade ground: it is in the memory of that time on the territory of the gate was a monument in the form of a sculpture of a soldier in bronze. Throughout its history the tower not once managed to save the city during the siege. During the war it served as occupation troops, in the later period of the premises of the tower was used as a lodging-house, tourist base and the Hitler youth hostel. Now there is the headquarters of the "Carnival of the society of Aachen", as well as a wine cellar and archive room.