Nuraghi are ancient stone structures found primarily on the island of Sardinia, Italy. They date back to the Bronze Age, around 1500 to 500 BCE, and are characterized by their unique beehive shape. These structures were built using large limestone blocks and served various purposes, including as defensive towers, dwellings, and places of worship. The nuraghi are a significant part of the Nuragic civilization, which thrived in Sardinia during this period. There are over 7,000 nuraghi scattered across the island, with the most famous being Su Nuraxi in Barumini, a UNESCO World Heritage site.