Trullo (Trulli plural) is a type of building typical of the town of Alberobello in the Puglia region.
The history of these very special buildings is linked to an edict of the Kingdom of Naples in the fifteenth century underwent a tribute every new urban settlement. The Counts of Conversano, owners of the land on which it stands today Alberobello, then imposed on farmers in the land to build their houses without the aid of mortar, so they can be considered as precarious buildings.