Another phantom island, mentioned on this map, is Antillia, also known as the Island of Seven Cities or St Brendan’s Island, and often used as a synonym for the Isles of the Blessed or the Fortunate Islands. The muddled legends of Antillia have been around since at least Plutarch’s time (ca. 74 AD). Its name might be a corruption of Atlantis; or a derivation of anterioris insula, Latin for an island located ‘before’ Cipangu; or a transformation of Jazeerat at-Tennyn, Arabic for ‘Island of the Dragon’. Toscanelli on his map uses Antillia as the main marker for measuring distance between Portugal and Cipangu.
