The Towers of Bologna are a group of medieval structures in Bologna, Italy. The two most prominent ones, also called the Two Towers, are the landmark of the city.
Between the 12th and the 13th century, the number of towers in the city was very high, possibly up to 180 (see also below). The reasons for the construction of so many towers are not clear.
One hypothesis is that the richest families used them for offensive/defensive purposes during the period of the Investiture Controversy.