Numerous photographs, scaled maps, and drawings trace the development of this vernacular architecture from the Stone Age to the present."A trullo (plural, trulli) is a traditional Apulian dry stone hut with a conical roof. Their style of construction is specific to the Itria Valley, in the Murge area of the Italian region of Apulia. Trulli were generally constructed as temporary field shelters and storehouses or as permanent dwellings by small proprietors or agricultural labourers. Their golden age was the 19th century."--Wikipedia.