800 mm artillery

The term "800 mm artillery" typically refers to a type of large-caliber artillery piece that has a bore diameter of 800 millimeters. The most notable example of an 800 mm artillery piece is the **Schwerer Gustav**, a heavy railway gun developed by Nazi Germany during World War II. It was designed for the purpose of penetrating heavily fortified positions, such as the French Maginot Line or the Soviet Union's defenses.