Bologna is the capital and largest city of the Emilia-Romagna Region in Northern Italy. It is the seventh most populous city in Italy, at the heart of a metropolitan area of about one million people.

Of Etruscan origin, the city has been a major urban centre for centuries, first under the Etruscans, then under the Romans (Bononia), then again in the Middle Ages, as a free municipality and signoria, when it was among the largest European cities by population. Famous for its towers, churches and lengthy porticoes, Bologna has a well-preserved historical centre, thanks to a careful restoration and conservation policy which began at the end of the 1970s. Home to the oldest university in the world the University of Bologna, established in AD 1088, the city has a large student population that gives it a cosmopolitan character. In 2000 it was declared European capital of culture and in 2006, a UNESCO “City of Music” and became part of the Creative Cities Network.

No more than twenty medieval defensive towers remain out of up to 180 that were built in the 12th and 13th centuries before the arrival of unified civic government. The most famous of the towers of Bologna are the central “Due Torri” (Asinelli and Garisenda), whose iconic leaning forms provide a popular symbol of the town.

The Portico di San Luca is possibly the world’s longest. It connects Porta Saragozza (one of the twelve gates of the ancient walls built in the Middle Ages, which circled a 7.5 km (4.7 mi) part of the city) with the Sanctuary of the Madonna di San Luca, a church begun in 1723 on the site of an 11th-century edifice which had already been enlarged in the 14th century, prominently located on a hill (289 metres (948 feet)) overlooking the town, which is one of Bologna’s main landmarks. The windy 666 vault arcades, almost four kilometres (3,796 m or 12,454 ft) long, effectively links San Luca, as the church is commonly called, to the city centre.

source: Wikipedia