Île d'Oléron is an island off the Atlantic coast of France (due west of Rochefort), on the southern side of the Pertuis d'Antioche strait.It is the second largest French island after Corsica (not counting French overseas collectivities).HistoryIn the 7th and 8th century, the island, along with Ré, formed the Vacetae Insulae or Vacetian Islands, according to the Cosmographia. Vaceti being another name for the Vascones, the reference is evidence to Basque (Gascon) settlement or control of the islands by that date.It was at Oléron in about 1152 to 1160 that Eleanor of Aquitaine introduced the first 'maritime' or 'admiralty' laws in that part of the world: the Rolls of Oleron. In 1306, Edward I of England granted the island to his son, Edward II, as part of the duchy of Aquitaine.On 20 March 1586, the island was taken by Agrippa d'Aubigné.GeographyThe island has an area of about 174 km2. It is a fertile and well cultivated island on the Atlantic coast of France, that is on the Bay of Biscay.