Princess Caroline's Battery (pictured at right) is in Gibraltar, the British Overseas Territory at the southern end of the Iberian Peninsula.

[3][4][5] It was constructed in 1732 and named after Princess Caroline of Great Britain (pictured at left), the third daughter of King George II.

[8][9] In 1871, the battery featured a 9-inch rifled muzzle loading gun, with an Elswick Ordnance Company carriage and platform.

[10] In 1905, the battery was refurbished to accommodate the 6 inch Mark VII gun (pictured below) that was installed on top of the magazine.

The explosive charges were passed through the dispensing hatch (pictured below) at the floor level and were then raised by a hoist to those manning the gun.

In order to avoid the danger of an inadvertent explosion caused by a spark, soldiers changed their clothes in an adjacent annex, and even wore special footwear.