Recent archaeological discoveries show that the territory of Alberobello has been inhabited since the Neolitico and the trullo would have come in Puglia around the XIII sec. a.C. thanks to an immigration of Cretesi or Micenei or, to the limit, for a following Greek migratory wave. The construction to "tholos"

(word probably of Greek origin that means dome) it would be a derivation in masonry of the primitive hut. Some local historians are convinced that the trullo is born around the XVI sec. to want some family Acquaviva in Aragon for the facility with which these constructions could be dejected, even on the occasion of regal inspections. The whole structure of the trullo is built with local calcareous stone. In the primitive constructions the thick carrying masonry was formed from non square stones, set in way not to regulate without binding. Contrarily, in the recent ones, the used stones are square regulated and well prepared. On the masonry the coverage is positioned to "trullo" formed by concentric rings day stone put in light projection toward the inside. On every of it leans that impending of smaller diameter. The masonry of support and the cone are bleached with milk of mortar. The only part that stays exposed to the bad weather and because of these assumes a grey color it is the external coverage constituted by calcareous plates, said chiancarelle, prepared without the use of binder in rows overlapped with inclination toward the outside, to facilitate the slide of the water piovana, canalized toward an underground cistern. The vertex of the trullo possesses a pinnacle that stops the last rows. Every abode is endowed with only access to the road. Benches in stone are often set on the adjacent space the entry. Other element that characterizes the architecture-type of the trullo they are the chimney pots from the varied forms. The most archaic is to form of cube surmounted by a wide and thin plate of stone. It was the inhabitant of the trullo to modify the use of the inside spaces in base to his own demands. The structure of the trullo is, in fact, modular. It allows to annex new places to the initial nucleus. The stalls, the deposits, the sheepfolds were, generally separated by the housing nucleus paved with "basole" of calcareous stone, and it has handed of entry. You construction of a wood loft allowed to exploit the volume of the conic coverage as I deposit for the agricultural utensils and alimentary commodities or, in other occasions as bedroom for their children. In the underlying environment they were two separate environments: the alcoves and the "focarili". The first ones, are great niches destined to the rest endowed with arc and time to barrel without door of entry or window; the seconds, are a sort of room-fireplace used for the cooking of the foods and for the production of heat. From these last, by now rare, it was entered, through a small door, to the garden. The pinnacle, element to point, is composed, in the most greater part of the cases, from four elements. The first part is constituted by the last rows sealed with mortar and bleached with mortar; the second, in stone, cannarile is said and has cylindrical form or to trunk of cone; the third one, always in stone, and said carrozzala or bowl; the fourth grade, the tail, often constituted by a sphere of stone, can assume varied forms. The pinnacles can be decorated according to the taste of the owner of the residence or to bring a kind of mark correspondent to the trullaro (builder). According to some studious ones, the use of the decoration is connected to primitive magic symbols even if the most greater part of the signs that they characterize the roofs of the "trulli" they have religious nature. According to a 1940 classification they can be divided in primitive, magic, pagans, Christians, ornamental and grotesque. To the primitives that symbols easily belong not referable to some real model. They are often interlacements of curves and lines, of circles and triangles, of isolated points and terminal lines, primarily of number of three, five and seven. The magic signs are to connect to astrological signs, zodiacali and planetariums. The pagans are to connect to the ancient cult of the animals professed by the Romans. The Christian representations are those more common, numerous and various and they refer to the demonstrations and recurrences of the Catholic Church. The grotesque and ornamental symbols derive from the imagination of the owner of the trullo. Close to the initials of the name and last name of the owner and, often represented the tool of his/her work. Flowers, woven hearts or stars don't miss.