The Cannons of the Castillo
Click on the links below to view picture postcards of the cannons currently on display at the Castillo. (You'll need the latest version of Adobe Acrobat Reader to view these files. You can download it for free on Adobe's web site.)
More to come!
Did You Know?
Black, or gun, powder is a mix of potassium nitrate, sulfur, and charcoal used as a propellant charge in cannons. Burning rapidly when ignited, it expands 600 times its volume creating pressures that can hurl a cannonball up to 3.5 miles! Castillo de San Marcos National Monument, Florida