List of the largest cannon by caliber

For the purpose of this list, the development of large-calibre artillery can be divided into three periods, based on the kind of projectiles used, due to their dissimilar characteristics, and being practically incommensurable in terms of their bore size: The list includes only cannons that were actually built, that is, cannons that existed only as concepts, ideas, proposals, plans, drawings or diagrams are excluded.

Also excluded are those cannons that were only partially built (not a single complete artillery piece of the cannon type in question fully built).

Naturally, the list only includes real cannons (made from metal and meant to be fired with gunpowder and a projectile to cause major destruction) and replicas etc.

(made from plastic or fiberglass, for example) and other non-real cannons (meaning those cannon-like pieces that were not meant to be fired with gunpowder and a projectile capable of causing major destruction) are excluded.

Heyday: 15th to 17th centuries Caliber: 530 mm (ball diameter); Mass: ~ 8.6-8.8 t; Shell weight: 209 kg[11] Heyday: 16th to 19th centuries Twenty-inch (508 mm) Rodman and Dahlgren smoothbore cannons were cast in 1864 during the American Civil War[citation needed].