Príncipe is the smaller of the two major islands of São Tomé and Príncipe lying off the west coast of Africa. It has an area of 136 km² and a population of around 5,000 people. It rises in the south to 948 metres at Pico de Príncipe, in a thickly forested area forming part of the Obo National Park. The north and centre of the island were formerly plantations but largely reverted to forest. The island forms one province and one district named Pagué. The languages other than Portuguese includes Principense or Lunguyê with a few Forro speakers.
The island has one town, Santo António, and an airport (IATA code: PCP, ICAO: FPPR?), as well as some small villages including Bela Vista, Bombom, Futuro, Neves Ferreira, Paciencia, Ponta Fonte, Ribeira Ize, Santo Antonio de Ureca, Vila Rosa and more – few connected to the small road network.
The island is a heavily eroded volcano over three million years old, surrounded by other smaller islands including Ilheu Bom Bom, Ilhéu Caroço, Tinhosa Grande and Tinhosa Pequena.
Príncipe was the site where Einstein’s Theory of Relativity was experimentally proved successful by Arthur Stanley Eddington and his team during an eclipse in 1919.