Schwerer Gustav - Hitler's giant gun - How it worked and why it

The Gustav gun was a gun about 12 meters high, 47 meters long, weighing 1,350 tonnes and was firing 10 tonnes shells through a 30 meters long pipe. 22 people could sit aligned on the barrel of the gun.

Krupp 80 cm Kanone Schwerer Gustav (Dora) Railway Gun

Heavy Gustav - The Largest Weapon Ever Built

Second World War Weapons That Failed

Schwerer Gustav: Largest Gun Mankind Has Ever Built

The UnMuseum: Schwerer Gustav - World's Biggest Gun

Steam Workshop::Schwerer Gustav

Hitler's Monster Tanks

World War II in Pictures: Big Guns of World War II

The Heavy Gustav, Hitler and generals inspecting the largest caliber rifled weapon ever used in combat, 1941 - Rare Historical Photos

Review: Museum of the Atlantic Wall, Pas de Calais - Mechtraveller

A Nazi War Train Hauled the Biggest Gun Ever Made, by James Simpson, War Is Boring

Kuvira's spirit energy weapon resembles Schwerer Gustav, a World War II Nazi Germany railway gun - 9GAG