Pumhart von Steyr

The Pumhart von Steyr is a medieval large-calibre cannon from Styria, Austria, and the largest known wrought-iron bombard by caliber.[1] It weighs around 8 tons and has a length of more than 2.5 meters. It was produced in the early 15th century and could fire, according to modern calculations, an 80 cm stone ball weighing 690 kg to a distance of roughly 600 m after being loaded with 15 kg of gunpowder and set at an elevation of 10°.[2]

Pumhart von Steyr
The Pumhart von Steyr in the Heeresgeschichtliches Museum at Vienna
Place of originLiezen, Styria, Holy Roman Empire
Service history
Used byHabsburg
Production history
DesignedEarly 15th century
Mass~ 8 t
Length259 cm
Barrel length144 cm
Diameter76–88 cm (conical muzzle)

Shell weight690 kg
Caliber80 cm (ball diameter)
Maximum firing rangeca. 600 m

The bombard is today on display in one of the artillery halls of the Heeresgeschichtliches Museum at Vienna.

Besides the Pumhart von Steyr, a number of 15th-century European large-calibre weapons are known to have been employed primarily in siege warfare, including the wrought-iron Mons Meg and Dulle Griet as well as the cast-bronze Faule Mette, Faule Grete and Grose Bochse.


See also


  • Schmidtchen, Volker (1977), "Riesengeschütze des 15. Jahrhunderts. Technische Höchstleistungen ihrer Zeit", Technikgeschichte, 44 (2): 153–173 (162–164)
  • Schmidtchen, Volker (1977). Bombarden, Befestigungen, Büchsenmeister: Von den ersten Mauerbrechern des Spätmittelalters zur Belagerungsartillerie der Renaissance. Düsseldorf: Droste. pp. 33–34. ISBN 3-7700-0471-X.

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