In Assassin's Creed II, the Auditore family headquarters is called Villa Auditore.
Villa Auditore stands in the Tuscan settlement of Monteriggioni. After Ezio escapes Florence with his mother and sister, his uncle Mario brings the surviving family to the villa. The property becomes a safe place and a strategic base during Ezio's fight against the Templars.
Players can restore the surrounding town and improve the villa's facilities. Renovating shops and services generates income and makes Monteriggioni more useful as the game progresses. The villa also houses records, equipment, and visual reminders of the Auditore family's story.
Monteriggioni is the settlement where the villa is located, which can cause the two names to be confused. Castello di Monteriggioni refers to the fortified town's castle, while Villa Auditore is the specific family residence and headquarters.