The Two Towers
The Symbol of the City at 6oomt from the Hotel Metropolitan.

The taller one is called the Asinelli while the smaller but more leaning tower is called the Garisenda.
Their construction is presumed betweenn was  1109 and 1119, but the scarcity of documents from this early period makes this in reality rather uncertain.

The Asinelli Tower has a height of 97.2m (with an overhanging rock of 2.2 m).

The Garisenda Tower has today a height of 48 m with an overhang of 3.2 m.
It was cited several times by Dante in the Divine Comedy and the The Rime (a confirmation of his stay in Bologna). The Two Towers have also been subject of an homonymous poem by Giosuè Carducci as part of the Barbarian Odes.

Further information on the Official Web Site (in Italian)