What was the biggest artillery in history?

Schwerer Gustav: The Largest Artillery Piece Ever Built

When it comes to massive weaponry, nothing in military history compares to the colossal German railway gun known as Schwerer Gustav. Designed in the late 1930s by Krupp, this monstrous piece of engineering remains the largest-caliber rifled weapon ever used in combat and the heaviest mobile artillery piece ever created.

Standing at a towering height of 11.6 meters (nearly 38 feet) and weighing over 1,350 tonnes, the gun was capable of firing massive 800 mm shells over distances of up to 47 kilometers. It utilized two primary types of ammunition: a concrete-piercing shell weighing over seven tonnes and a high-explosive variant designed to shatter heavily fortified positions.

Operating a weapon of this magnitude required immense logistical effort. Assembling the gun took a dedicated crew of 250 personnel roughly 54 hours over three days. However, the broader support network was far larger. Around 2,500 workers were needed just to lay specialized dual-track railways and dig embankments, while two entire anti-aircraft battalions were assigned solely to shield the giant from aerial attacks.

Despite its breathtaking scale and immense firepower—most famously demonstrated during the Siege of Sevastopol in 1942—Schwerer Gustav was far from a practical battlefield asset. Its sheer size made it extremely vulnerable to airstrikes, difficult to deploy, and enormously expensive to maintain. Ultimately, as warfare shifted toward mobility and air power, giant railway artillery became obsolete, leaving Schwerer Gustav as a staggering monument to extreme engineering.