Mahon is the capital of Menorca, second largest of the Balearic Islands. It stands out from the others because of the abundance of prehistoric structures, and because its culture was influenced by British occupation in the 18th century. The people who built the prehistoric constructions are believed to have been responsible for similar works in Sardinia, and for Stonehenge in England. Believed to have been founded by the Carthaginian General Mago, Mahon was held by the Moors from the 8th to the 13th century and in turn occupied by the English, the French and the Spanish. Mahon was finally ceded to Spain by the Treaty of Amiens in 1802.