Antwerp is Belgium's second-biggest city. It boasts a lovely historic city center and is well-known across the world for its fashion sector. Antwerp's port is Europe's second-biggest and a key economic player in Belgium. Apart from being a popular tourist attraction in Belgium's Flanders area, it is also known as the "world's premier diamond metropolis," with more than 70% of all diamonds traded there. The Diamond Market is the economic center of Belgium.