French 520mm howitzer -biggest of WW1

Schneider Obusiers de 520. This French 520mm howitzer was the biggest gun of the Great War. It could deliver a 3,100 lb shell (600 lbs of explosive) over 10 miles. The gun car was just under 100 feet long and weighed 290 tons.

Trenches on the Web - Photo Archive: Big Guns of the Great War

 

Too bad they did not keep the thing operational for when the Germans came back in WWII.

 

wow what a massive weapon one would not want to be in a slit trench
with them raining down....anic:

 

Though oddly not the thrower of the western front's heaviest shell.e

That honour belongs to the to 18"/40 Mk.1 mounted on the monitor General Wolfe, which delivered 81nr. 3320lb shells onto an Ostend rail bridge at a range of 36,000yds. Not only the heaviest shell but also the longest range of at which the RN ever engaged a (rather sedentary...) target.