Traditional Oil Mills

Oil has always been an important resource for the island. In 1938, there were 284 traditional oil mills. These production units were all underground, most of them invisible from the outside as they were dug into rocky layers; however, some stood out due to a more advanced architecture, being entirely built below ground. This architectural style seems to be justified for climatic reasons.

Indeed, these underground constructions create a constant temperature favorable for oil extraction, which usually takes place during the winter season. The varieties of olive trees cultivated on the island produce fruits whose oil separates at a temperature (above 14°C) that only the underground environment can maintain in winter.

Among the few remaining examples preserved today is this oil mill. It showcases an ancient structure revealing traditional methods for crushing and pressing olives. From the outside, the mill is marked by an imposing dome preceded by a sloping vault and flanked by two long barrel vaults.