Built between 1109 and 1119, the Torre degli Asinelli reaches 97.2 metres, with 498 steps inside. Its neighbour, raised in the same years by Filippo and Oddo dei Garisendi, began to lean while it was still being built, as the ground beneath it subsided, and it was lowered in 1355 to about 47 metres. Dante noticed it: a plaque at Piazza di Porta Ravegnana 19 quotes his lines on the Carisenda from Inferno XXXI.
Since October 2023 the Comune di Bologna has kept the Asinelli closed to visitors and the square at the towers' feet fenced off while the Garisenda is made safe. You cannot climb today, but the towers remain the city's compass point. Look at them from the surrounding streets, follow the restoration, for which the Mayor has set a 2028 target, and come back to climb when the stairs reopen.