Siena, a city in central Italy's Tuscany region, is distinguished by its medieval brick buildings. The fan-shaped central square, Piazza del Campo, is the site of the Palazzo Pubblico, the Gothic town hall, and Torre del Mangia, a slender 14th-century tower with sweeping views from its distinctive white crown. (Source)
Modern day Siena is one of the few cities in the world that's surrounded by a completely intact medieval wall. It's known for its beautiful churches, palaces, towers, fountains an, above all, the best known of Italian wines, Chianti.
Fifth & Ninth's Siena sunglasses feature a dramatic cat eye frame with gold accent pieces on both temples to elevate their look and take you back to the majesty of their namesake, Siena, Italy.
Source: edited from Wikipedia and Encyclopedia Britannica