Princess Royal's Battery is an artillery battery in the British Overseas Territory of Gibraltar. It is located on Willis's Plateau at the northern end of the Upper Rock Nature Reserve, just southeast of Princess Anne's Battery. Formerly known as Willis's Battery, and later, Queen Anne's Battery or Queen's Battery, it was renamed in the late 18th century after Charlotte, Princess Royal, the eldest daughter of George III. The battery was active from the early 18th century until at least the mid-20th century. However, it has been decommissioned and guns are no longer present. Princess Royal's Battery is listed with the Gibraltar Heritage Trust.Early historyPrincess Royal's Battery is in Gibraltar, the British Overseas Territory at the southern end of the Iberian Peninsula. The artillery battery is one of several located on Willis's Plateau, named after a British artillery officer commended for his actions during the capture of Gibraltar in 1704. During the early 18th century, the batteries on that plateau were referred to as the Willis's Batteries. Princess Royal's Battery is positioned at the northern end of the Upper Rock Nature Reserve, southeast of Princess Anne's Battery, and in proximity to the entrance to the Middle Galleries, the 18th century tunnels.