Gibraltar is a British Overseas Territory located at the southern end of the Iberian Peninsula, with an area of 6.8 square kilometers and a northern border with Spain. It has a long history of occupation and changing sovereignty, being inhabited first by Phoenicians and later controlled by the Moors, Castile, and Britain. In a 2002 referendum, Gibraltarians voted overwhelmingly to remain under British sovereignty rather than accepting shared sovereignty with Spain. The Rock of Gibraltar and its surroundings are home to over 500 plant species as well as a nature reserve containing Barbary macaques. The population is ethnically diverse with British, Spanish, and Italian descendants, and mainly speak English along with the local Llanito