Saint Helena (/ˌsɛnt (h)ɪˈliːnə, ˌsɪnt-, sənt-/, US: /ˌseɪnt-/; US: /ˌseɪnt ˈhɛlənə/ ) is a volcanic and tropical island, located in the South Atlantic Ocean, some 1,874 km (1,165 miles) west of the mainland of the continent of Africa, with the Southern African nations of Angola and Namibia on its southeastern coast being the closest nations geographically. The island is around 1,950 km (1,210 mi) west of the coast of southwestern Angola, and 4,000 km (2,500 mi) east of the major seaport city of Rio de Janeiro, Brazil in South America. It is one of the three constituent parts of Saint Helena, Ascension and Tristan da Cunha, a British overseas territory.
Saint Helena measures about 16 by 8 km (10 by 5 mi) and had a population of 4,439 in the 2021 census. It was named after Saint Helena (AD c.246/248–330), the mother of the Roman Emperor Constantine I the Great. (A.D 272–337, reigned 306–337), of the ancient Roman Empire. It is one of the most remote major islands in the world and was uninhabited until the 16th century, when it was discovered by the Portuguese explorers/traders en route southward around the continent of Africa, then east across the Indian Ocean to the Indian subcontinent (India) of South Asia in 1502. For about the next four centuries, the island was an important stopover for ships between Europe and Asia sailing around the African continent and its southern Cape of Good Hope, before the opening of the shortcut Suez Canal in 1869, in Egypt between the Mediterranean and Red Seas.
