Monster Mortar

Monster mortar
Monster mortar employed during the siege of Antwerp Citadel in 1832
TypeHeavy mortar
Place of originBelgium
Service history
In service1832
Used byBelgium
WarsSiege of Antwerp (1832)
Production history
DesignerHenri-Joseph Paixhans
Designed1832
ManufacturerRoyal cannon foundry of Liège
No. built2
Specifications
Mass7,750 kg (17,090 lb) (without carriage)

Shell500kg bomb
Caliber24 inches (610 mm)
Barrels1
Feed systemMuzzle loading
Fillingpowder
Filling weightMax. 14 kg (31 lb)

The Monster Mortar (French: Mortier Monstre) was one of the largest mortars ever developed. Also called Leopold or the Liège mortar, the 24 inches (610 mm) caliber mortar was conceived by the French artillery officer Henri-Joseph Paixhans. The mortar was manufactured under the direction of the Belgian Minister of War Baron Louis Evain and cast at the Royal Canon Foundry (Fonderie royale de canons) in Liège, Belgium in 1832. It saw action at the Battle of Antwerp in December 1832.