Aidone is located on a hill in the Erei Mountains. The surrounding hilly landscape, with its deep valleys, influences the stability of the slopes and the availability of water resources. The town offers wide views of the surrounding landscape and the Gornalunga Valley. On a plateau in front of the valley lies Morgantina, a Sicilian, Greek and Hellenistic archaeological site. The area is also known for its environmental heritage, characterised by an abundance of natural and artificial forests, extending into the north-western part. The proximity of the Ronza Park and the artificial Lake Ogliastro makes this an area of considerable naturalistic interest.
The original historic centre appears to have emerged between the time of a probable Byzantine fortification among the ruins of ancient Morgantina and of an Arab hamlet directly on the crest of the mountain bearing the same name. According to the cartographer and traveller al-Idrisi – commissioned by Roger II, the Norman King of Sicily, to compile one of the most significant geographical works of medieval history, the Tabula Rogeriana – the place name might derive from the Greek word aidon, meaning nightingale, or might be of Arabic origin, from the term aidun (water source). Completed in 1154, the book offers detailed descriptions of the world as it was known at the time, based on a wide collection of information from travellers, merchants and scholars, combined with al-Idrisi’s own personal observations. The book includes maps and geographical descriptions of countries, rivers and mountains, as well as information on the peoples, cultures and economic resources of the various regions.
The Arab town of Aidone must have been large and prosperous, as it had at least three mosques, which later became Christian churches. The town came under Norman rule when it was granted to the noblewoman Adelicia, or Adelasia, the niece of Roger II. In order to consolidate their power and ensure control of the island, the new rulers pursued a systematic policy of founding and repopulating fortified settlements and granting fiefdoms. From the mid-11th century onwards, the Altavilla family undertook a military campaign, as well as a process of geographical, demographic, and socio-economic redefinition. In the 13th century, Frederick II of Swabia authorised a second migration of Gallo-Occitans from the Piacenza area, involving the nearby town of Piazza Armerina. Strategically located to control communication routes and agricultural areas, Aidone provides significant insight into the Normanisation process in Sicily. The settlement and cultural strategies that shaped the Middle Ages on the island are still visible today in the remains of the Castle of Gresti, despite its severe damage in the violent earthquake of 1693, and are also evident in the Aidonese dialect, which forms part of the Gallo-Italic linguistic island.
