In Assassin's Creed II, Ezio's family villa is in Monteriggioni.
Monteriggioni is a fortified hill town in Tuscany that becomes the Auditore family's base in the game. Ezio and his allies use the Villa Auditore as a safe house, headquarters, and economic hub. Players can renovate buildings and services in the town, increasing its value and generating income for later activities.
The real Monteriggioni is a medieval walled settlement near Siena, known for its defensive towers and compact fortifications. Assassin's Creed II recreates the town in a historical-fiction setting and connects it to the Auditore family through the game's narrative.
San Gimignano and Forlì are also locations visited in Assassin's Creed II, while Venice is one of the game's largest cities. That makes them tempting answers, but only Monteriggioni contains Ezio's main family villa. The town is also revisited in later franchise stories.