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A journey from north to south of Puglia to discover the many types of trulli scattered in the countryside, with different shapes and functions.
The study of the Apulian geographical area led to the discovery of a widespread number of Trulli that arise isolated or in small groups in the countryside, mostly single-celled and connected to agricultural and pastoral activities. They are found in the Gargano, in the Tavoliere (the largest plain in peninsular Italy who is located in the north of Puglia), in the Alta and Bassa Murgia, in the province of Taranto and in Salento. They take different forms in the various geographical areas, although strong similarities can also be found in distant areas.
From a primary shape with an ogival hut, the building evolves towards truncated pyramidal shapes with almost always single cell inclined bases, which often have a roof with a terrace where vegetables and fruit to be kept for the winter were exposed to the sun. From the consecutive overlapping of trunks of cones, with constant or different height and from a consecutive overlapping of pyramidal trunks of decreasing width upwards, two other models of dry stone buildings have been updated, which sometimes have more rooms. Other stone architectures, in particular those built on extensive land properties, have a base consisting of accumulations of stones around, therefore often confused with agricultural specchie, heaps of stones scattered in the cultivated land and formed when the stony fields of the Murgia were recovered.
The roofs, which are accessed via external stairs obtained in the thickness of the walls, can have a terrace, in the shape of a cone (trullo) or a heap (or mound) consisting of crushed stone and earth on which a grass covering grows. With the exception of the buildings with terraced roofs, the other models inside show the rough tholos vault. The entrance arches are almost always with the architrave, sometimes arched or with bilites with two monoblocks resting on each other to form a triangle; this variant also has a stone interposed as an arched key. The small subsidiary ventilation openings generally face the entrances.