"The Main Guard is a historic, 18th-century guardhouse in the British Overseas Territory of Gibraltar. While the exact date of its construction is unknown, it is the oldest building in John Mackintosh Square. The French artist Henri Regnault produced three paintings while a visitor at the Main Guard. After being displayed at the guardhouse for many years, they are now kept at the Gibraltar Museum. The building's function has changed with the centuries."@en . . . . "13John Mackintosh Square"@en . "Main Guard"@en . . . . .