List of the largest cannon by caliber (source code)

= List of the largest cannon by caliber
{wiki=List_of_the_largest_cannon_by_caliber}

Here is a list of some of the largest cannons by caliber, notable for their size and historical significance: 1. **Dora and Gustav (Germany)** - These railway guns were built during World War II and had a caliber of 800 mm (31.5 inches). They were among the heaviest and largest artillery pieces ever constructed, specifically designed for long-range bombardment.