Settled by Celts around 600 BC, Milan is a major city in northern Italy. A major fashion capital, along with New York City and Paris, Milan is home to Armani, Versace, and Prada. Considered Italy’s economic-financial capital, Milan is also known for its shopping, housing the Galleria Vittorio Emanuele, which is thought to be the oldest shopping center in the world. Some points of interest in Milan are the Pirelli Tower (Italy’s tallest skyscraper), Castello Sforzesco, and the La Scala Theater, one of the world’s premier opera houses. Milan has an estimated population of 1.3 million residents.