Italy has a population of over 61 million people and its capital and largest city is Rome. The official language is Italian and the currency is the Euro. It is a parliamentary republic led by President Giorgio Napolitano and Prime Minister Mario Monti. Key industries include agriculture, tourism, and natural resources, and its largest trading partners are Germany, France, the United States, Spain, and Switzerland. Some of its major cities are Milan, Turin, Naples, and Palermo and notable landmarks include the Venetian canals, Leaning Tower of Pisa, and the Vatican. Famous historic figures from Italy include Christopher Columbus, Galileo Galilei, and Leonardo Da Vinci.