Florence is the capital city of the Italian region of Tuscany. It is the most populous city in Tuscany, with 383,084 inhabitants in 2013, and over 1,520,000 in its metropolitan area. Florence was a centre of medieval European trade and finance and one of the wealthiest cities of that era. It is considered the birthplace of the Renaissance, and has been called "the Athens of the Middle Ages". A turbulent political history includes periods of rule by the powerful Medici family and numerous religious and republican revolutions. From 1865 to 1871 the city was the capital of the recently established Kingdom of Italy. The Florentine dialect forms the base of Standard Italian and it became the language of culture throughout Italy due to the prestige of the masterpieces by Dante Alighieri, Petrarch, Giovanni Boccaccio, Niccolò Machiavelli and Francesco Guicciardini. The city attracts millions of tourists each year, and the Historic Centre of Florence was declared a World Heritage Site by UNESCO in 1982. The city is noted for its culture, Renaissance art and architecture and monuments. The city also contains numerous museums and art galleries, such as the Uffizi Gallery and the Palazzo Pitti, and still exerts an influence in the fields of art, culture and politics. Due to Florence's artistic and architectural heritage, it has been ranked by Forbes as one of the most beautiful cities in the world. Florence is an important city in Italian fashion, being ranked in the top 15 fashion capitals of the world; furthermore, it is a major national economic centre, as well as a tourist and industrial hub. In 2008, the city had the 17th highest average income in Italy.