Which city lies on the Arno river?

The Arno is a river in the Tuscany region of Italy. It is the most important river of central Italy after the Tiber.

The river originates on Mount Falterona in the Casentino area of the Apennines. The river turns to the west near Arezzo passing through Florence, Empoli and Pisa, flowing into the Tyrrhenian Sea at Marina di Pisa.

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".

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