Mechanical Boring Machine

Leonardo Da Vinci's Crossbow Sketch

Siege Weapons Plate A

Siege Weapons Plate B

Siege Weapons Plate C

Siege Weapons Plate D

Siege Weapons Plate E

Siege Weapons Plate F

Siege Weapons Plate G

Fanciful Ideas for Siege Weapons

Iron Projectiles

Staff Slings

More Staff Slings

Defending a Castle Against Miners

Tossing Heads into a Fortress

Growing Use of Gunpowder