The Trulli are the hallmark of Alberobello. The round houses are bricked from the limestone of the Murge area in drywall style.
On the hill Monti there are about 1000 Trulli, where about 3000 inhabitants live. In the area of the district of Aja Piccola and Piazza del Popolo there is a small village consisting of 15 trulli, the oldest of which date back to the 14th century.