Trullo is an Italian term for a small, round house with a conical roof, typically made of dry stone. It is a unique architectural design found primarily in southern Italy, particularly in the region of Puglia. The word trullo has a few synonyms, including a pinnacolo, a cone-shaped structure found atop a building, and a cono, which is simply Italian for "cone." Other synonyms include a cupola and a turret, both of which can refer to a small dome-shaped structure on a building. The word trullo is a specific term for a distinct type of structure, but with these synonyms, any cone or dome-shaped structure could be described in a number of ways.