The Città metropolitana di Milano (Metropolitan City of Milan) is an administrative unit of Lombardy, Italy, with Milan as its capital city.

Its historical origins trace back to the ancient Roman Mediolanum, which later became the seat of the Western Roman Empire.

The metropolitan area covers a land area of approximately 1,575 square kilometers, with an elevation ranging from 116 to 180 meters above sea level.

As of 2023, the metropolitan city has a population of over 3.3 million residents, making it the second most populous metropolitan area in Italy after Rome.

The economy of Città metropolitana di Milano is highly diversified, with major industries including fashion, design, finance, publishing, and manufacturing.

It is a renowned center for fashion and design, hosting events like Milan Fashion Week and being home to numerous luxury brands.

The city is well-connected with a comprehensive public transportation system, including metro lines, buses, and trams, as well as international airports.

Città metropolitana di Milano played a significant role in Italy's unification and has been the site of important political and historical events.

It is home to the world-famous Teatro alla Scala, one of the most prestigious opera houses globally.

The city's cultural heritage is evident in its numerous museums, art galleries, and historical landmarks, including the Sforza Castle and the Milan Cathedral.

The metropolitan area includes several UNESCO World Heritage Sites, such as the Certosa di Pavia and the Sacri Monti of Piedmont and Lombardy.

The local tradition of "aperitivo" (an evening aperitif with snacks) is a popular social custom in Milan.

The city is known for its innovative scientific contributions, being home to renowned research institutions like the Politecnico di Milano.

The population of Città metropolitana di Milano has grown steadily in recent decades, driven by migration and economic opportunities.

The city has a vibrant nightlife and a lively music scene, with numerous bars, clubs, and concert venues.