Verona is a city straddling the Adige river in Veneto, northern Italy, with approximately 265,000 inhabitants and one of the seven chef-lieus of the region. It is the second largest city municipality in the region and the third of northeast Italy. The metropolitan area of Verona covers an area of 550.58 sq mi and has a population of 714,274 inhabitants. It is one of the main tourist destinations in northern Italy, owing to its artistic heritage, several annual fairs, shows, and operas, such as the lyrical season in the Arena, the ancient amphitheatre built by the Romans. Because of the value and importance of its many historical buildings, Verona has been named a UNESCO World Heritage Site. Verona preserved many ancient Roman monuments, no longer in use, in the early Middle Ages, but much of this and much of its early medieval edifices were destroyed or heavily damaged by the earthquake of 3 January 1117, which led to a massive Romanesque rebuilding. The Carolingian period Versus de Verona contains an important description of Verona in the early medieval era.