Alberobello, literally "beautiful tree", is a small town and comune of Apulia, southern Italy.
It has 10,237 inhabitants (2022) and is famous for its unique trullo (plural trulli) buildings.
The trulli of Alberobello have been designated as a UNESCO World Heritage Site since 1996, thanks to the unique architectural and historical value of trulli houses.
They are considered one of the best examples of vernacular architecture in Europe.
Alberobello is the only inhabited center with an entire district of trulli, and is considered to be the cultural capital of the trulli of the Itria Valley.
It is one of the most beautiful small towns of Italy.

In 1481 the Counts of Conversano D'Acquaviva D'Aragona, from 1481 owners of the territory of Alberobello, then imposed on the residents that they built their dwellings dry, without using mortars, so that they could be configured as precarious buildings and easily demolished.
Having to use only stones, the peasants found in the round form with self-supporting domed roof the simplest configuration.
The roofs were embellished with decorative pinnacles representing the signature of the architect (master trullaro).
This obligation to have houses built with dry stones was an expedient of the count to avoid paying taxes to the Spanish viceroy of the Kingdom of Naples.