The Southport Gates are Gibraltar, the British Overseas Territory at the southern end of the Iberian Peninsula.

[1][2] The gates are located in the Charles V Wall, one of the early fortifications of Gibraltar that defended the former southern limit of the city.

[8][9] The Southport Gates, together with a rifled muzzle loading ten inch 18 ton gun, are listed with the Gibraltar Heritage Trust.

[10] It was constructed by Italian engineer Giovanni Battista Calvi in 1552, under the reign of Charles V, Holy Roman Emperor.

[13][14] The gate was depicted in a 1627 map of Gibraltar by Spanish engineer Luis Bravo de Acuña.

[14] It was constructed during the reign of Queen Victoria and the term of Governor of Gibraltar General Sir John Miller Adye.

[11][15][17] The gate commemorates Gibraltar's first sovereignty referendum of 1967, in which Gibraltarians voted by an overwhelming majority to remain British rather than become Spanish.