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Mons Meg

Mons Meg is a medieval bombard in the collection of the Royal Armouries, on loan to Historic Environment Scotland and located at Edinburgh Castle in Scotland. It has a barrel diameter of 20 inches (510 mm), making it one of the largest cannons in the world by calibre. Mons Meg was built in 1449 on the orders of Philip the Good, Duke of Burgundy, and sent by him as a gift to James II, King of Scots, in 1454.

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Updated 27 Sept 2026. Something wrong? Tell us.