Le Due Torri di Bologna are the Asinelli tower (97.2 m, the tallest surviving medieval tower in Italy) and the Garisenda (48 m). The Garisenda leans 3.2 degrees from vertical and was shortened in 1351 because it had become too dangerous. The two are the most visible symbol of a city that in the 13th century had approximately 180 towers, built by rival noble families as status symbols, displays of power and military fortifications. That skyline earned Bologna the name “Manhattan of the Middle Ages”, and no other European city attempted anything on the same scale or density.
At a glance
Le Due Torri (Bologna; UNESCO 2021, ref. 1650 — inscribed as part of “The Porticoes of Bologna”) stand at the Croce di Piazza (the medieval crossroads of Via Emilia / Via San Vitale), the most important junction in the medieval city. They are not strictly porticoed buildings — but they are directly part of the UNESCO inscription as defining elements of Bologna’s historic urban landscape, which the WHC recognized as a unified whole including both the architectural typology (the portico) and the skyline it created. The Garisenda tower (the shorter, more dramatically leaning one) is famous from Dante’s Inferno (Canto XXXI, vv. 136-138) — the only building Dante described directly by comparing it to something real that his readers could visit: “Come la Garisenda pare al riguardare / sotto ‘l chinato, quando un nuvol vada / sovr’essa si, che ella incontro penda.”
Key facts
- Le 180 torri di Bologna medievale: At the height of the medieval period, in the 13th century, Bologna had approximately 180 tower-houses, the torri gentilizie or family towers. Noble and wealthy merchant families built them as expressions of power, prestige and factional rivalry; the Guelph-Ghibelline struggles drove intensive tower-building in Italian cities. Of those 180, only about 20 survive today. A tower was usually built within 10-15 years by the founding family, and served at once as a symbol of status, a defensive strongpoint, a store and a workshop. The two surviving towers that define Bologna’s skyline, Asinelli and Garisenda, were raised by the families of those names within approximately a decade of each other.
- Torre degli Asinelli (97.2 m, 1109-1119): Built by the Asinelli family between 1109 and 1119, it is the tallest medieval tower in Italy open to the public. It leans 2.23 degrees from vertical, an offset of 223 cm at the top, and 498 steps lead to the summit. In clear weather the view takes in the Apennines to the south, Ferrara and the Po plain to the north, Ravenna to the east and Modena to the west. The Commune of Bologna confiscated the tower in 1185, during the power struggle between the nobility and the rising merchant class. It served as the city prison until the 14th century, then as a watchtower, a clock tower and a civic landmark. The external base has medieval storage arches that were later used as wine shops.
- Torre Garisenda (48 m, orig. ~60 m, 1109-1119): Built by the Garisenda family, it was originally approximately 60 m tall. The lean was already dramatic in Dante’s time, around 1300. In 1351 the Commune reduced the height by 12 m because the lean was causing structural concerns. It now leans 3.22 degrees from vertical, an offset of 322 cm, significantly more than the Leaning Tower of Pisa (3.97 degrees, but much taller). It has been CLOSED to visitors since 2023, after microcracking was detected in the masonry, and is currently under structural monitoring.
- UNESCO: 2021, rif. 1650.
- GPS: 44.4941, 11.3474 — Google Maps (Le Due Torri, Piazza di Porta Ravegnana, Bologna).
History
The Asinelli and Garisenda towers were both built in approximately the same decade (1109-1119), by two rival families, on adjacent lots at the Croce di Piazza — the most commercially and strategically important crossroads in the medieval city. The competitive nature of the construction (both families were trying to build the tallest possible tower) and the fact that both were built in the same decade suggests a direct rivalry. The Garisenda family apparently began first but had structural problems (the lean began during construction, not after — the foundation soil was inadequate). The Commune of Bologna confiscated the Asinelli tower in 1185 and the Garisenda in the 13th century. Dante Alighieri visited Bologna twice (ca. 1287 and ca. 1302) and included a direct visual description of the Garisenda in the Inferno (Canto XXXI) — the only occasion in the Divine Comedy where Dante refers to a real contemporary building by name.
What you see
The Due Torri are visited at the Croce di Piazza (Piazza di Porta Ravegnana), where the Via Emilia / Via San Vitale intersection was Bologna’s medieval hub. The essential experience is the exterior: stand at the base of both towers and look straight up. The Garisenda lean is visible to the naked eye from street level, and the best shot of both towers together is from the Via Rizzoli portico, looking east.
The Asinelli interior is timed entry, and advance booking is recommended in summer. There are 498 wooden steps with banisters and lighting; the staircase is narrow and steep, and the round trip takes about 30-40 min. The view from the top is the best urban panorama in Bologna. The Garisenda is exterior only, closed since 2023 for structural monitoring: do not attempt to enter even if access appears possible. The bas-relief of the Dante citation from Inferno XXXI is inscribed on the base of the Garisenda, on the east face.
Gallery
Practical information
- Torre degli Asinelli: Piazza di Porta Ravegnana, Bologna. Open daily 10:00-18:00 in winter and 09:30-20:00 in summer; check seasonally. Admission ~€5-8, sold online via the ToB system, and timed entry tickets are recommended: without booking the queue can be 45+ min in summer. There are 498 steps and no lift. It is not recommended for visitors with knee problems or severe vertigo, as the stairs are steep, alternating wood planks and stone, with minimal handholds at the top sections. Photography permitted at top.
- Torre Garisenda: Closed since 2023 due to microcracking; estimated reopening unknown; check comune.bologna.it for current status. The exterior can be viewed from street level at any time.
Getting there
Le Due Torri, Bologna (BO), Emilia-Romagna. GPS 44.4941, 11.3474 — Piazza di Porta Ravegnana. 10 min walk from Bologna Stazione Centrale (south on Via dell’Indipendenza). 5 min walk from Piazza Maggiore (east via Via Rizzoli, under the porticoes). Adjacent to all major bus lines on Via Rizzoli. ZTL restricted by car; use Bologna Stazione Centrale or peripheral garages.
Nearby
- Piazza Maggiore — 300 m west via Via Rizzoli (under the porticoes); Bologna’s historic civic heart with San Petronio, Palazzo d’Accursio, and the Cassini meridian.
- Museo Civico Medievale — 200 m north via Via Manzoni; the medieval art collection of Bologna in the Palazzo Ghisilardi (1484), with medieval armour, Jacopo della Quercia reliefs, Giambologna bronzes, and medieval tomb sculptures; one of the best medieval collections in Italy outside Florence.
- Portici di Strada Maggiore — 300 m south-east; the longest continuous urban portico of medieval Bologna, stretching 850 m from Piazza di Porta Ravegnana to Via dei Mille; the most intact 13th-14th-century porticoed streetscape in the city.
Sources
- UNESCO: whc.unesco.org/en/list/1650..
- Wikipedia EN: Towers of Bologna..
- Dante Alighieri: Inferno, Canto XXXI, vv. 136-138 (reference to Garisenda).
- Comune di Bologna: comune.bologna.it..
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