The Two Towers of Bologna, Italy

There was a time when Bologna’s skyline featured as much as 180 tall towers. But over time, the number has declined and there are only 20 towers still standing today. Out of these 20 towers, the Asinelli and Garisenda towers, both leaning, are the most famous. It’s easy to see them thanks to their height that is 97 metres for the Asinelli, and 47 metres for the Garisenda. However, originally the height of the Garisenda was about 60 metres, until it was reduced in the 14th century to avoid the danger of its collapse.

This tower ________.