Bologna’s Piazza Maggiore is Italy’s largest porticoed civic square, enclosed on every side by continuous medieval arcades and dominated by the unfinished Gothic facade of San Petronio. Around it stand the monuments of communal power, making the square a readable chapter in the city’s 13th-century mercantile and civic rise.
At a glance
Piazza Maggiore and its adjacent Piazza Nettuno form the civic centre of Bologna. The main square measures roughly 100 by 60 metres and is bounded on all sides by buildings with ground-floor porticoes, creating a continuous covered perimeter. The piazza took its present shape during the 13th century, when the Commune of Bologna consolidated land to replace a scattered market with a single civic space.
Around it stand Palazzo d’Accursio, the town hall begun in 1245; Palazzo dei Notai, begun in 1381; Palazzo dei Banchi, begun in 1412; the Basilica of San Petronio, begun in 1390; and Palazzo Re Enzo, built in 1246. Each contributes an arcaded ground floor to the square’s porticoed frame.
Key facts
- Porticoed perimeter: Continuous ground-floor arcades run along the fronts of Palazzo d’Accursio, Palazzo dei Notai, Palazzo dei Banchi and Palazzo Re Enzo.
- Palazzo d’Accursio: Bologna’s town hall, begun in 1245 and enlarged until the 15th century. It houses the Collezioni Comunali d’Arte and municipal offices; its Torre dell’Orologio carries a 1451 astronomical clock, a later copy with original mechanisms in the Museo della Musica.
- Basilica di San Petronio: Begun in 1390 and still officially unfinished. The brick facade rises only to mid-height, and the original marble facing and flanking towers were never built. The three Gothic portals contain sculpture by Jacopo della Quercia.
- Cassini meridian: A brass line inlaid in the basilica floor in 1655 by Giovanni Domenico Cassini. At 66.8 metres it was used to calculate the solar year and verify the Gregorian calendar reform.
- Fontana del Nettuno: Giambologna’s 1566 bronze Neptune stands in the adjacent Piazza Nettuno. Its four sirens pressing their breasts to release water provoked a papal demand for clothing.
- UNESCO status: The square forms part of the porticoed ensemble recognised by UNESCO in 2021, under reference 1650.
History
The site of the present square was occupied by scattered buildings until the 13th century, when the Commune of Bologna resolved to clear them and create a single civic space. Demolition and consolidation lasted from about 1200 to 1246. Among the first buildings to front the new square were the Palazzo del Podestà, begun in the 1200s, and Palazzo Re Enzo, built in 1246 to house Frederick II’s son Enzo, King of Sardinia, who was held prisoner in Bologna from 1249 to 1272.
The Basilica di San Petronio was begun in 1390 on the south side under the architect Antonio di Vincenzo. Planned on a colossal scale, it was intended to surpass St Peter’s in Rome, but construction slowed after the first century amid funding disputes and Bologna’s complicated relationship with the Papal States; it remains unfinished.
What you see
Visitors can walk the full porticoed perimeter in about ten minutes, reading the different facades above the arcade line. The unfinished south side is dominated by San Petronio, one of the largest Gothic interiors in the world; inside, the floor is cut by the 1655 Cassini meridian, a brass line marked with hour and month circles, still illuminated by a pinhole in the dome at solstices and equinoxes.
On the exterior of San Petronio, the portal sculptures by Jacopo della Quercia run between the doorways, with the creation scenes between the first and second portals the most celebrated. The Bolognini Chapel contains frescoes by Giovanni da Modena, around 1410, including a vivid Hell scene. From the terrace of Palazzo d’Accursio, reached through the Collezioni Comunali d’Arte, visitors look down over the whole square. In summer the piazza becomes an open-air cinema for the Cinema Sotto le Stelle series, usually at sunset.
Practical information
- Access: Piazza Maggiore and Piazza Nettuno are open public squares and fully pedestrianised.
- Basilica di San Petronio: Entry is free; opening times change with the season and major services, so current hours should be checked on the basilica’s official channels.
- Palazzo d’Accursio collections: The Collezioni Comunali d’Arte charge admission and close one day a week; confirm current opening days and prices before visiting.
- Summer cinema: Cinema Sotto le Stelle runs in the square in the summer months, free or at low cost.
- Parking: The nearest covered car parks are Autosilo Indipendenza, north of the square, and Parcheggio San Francesco, to the west. Drivers should check current ZTL access rules for the centre.
Getting there
Piazza Maggiore is about a ten-minute walk from Bologna Centrale station along Via dell’Indipendenza, largely under the porticoes. City bus lines converge on Via Ugo Bassi and Via Rizzoli beside the square. By car, Bologna sits at the meeting point of the A1, A13 and A14 motorways; the city centre is subject to ZTL restrictions.
Nearby
- Piazza Nettuno — immediately adjacent; contains the Fontana del Nettuno by Giambologna.
- Palazzo Re Enzo — on the square, built in 1246 as the prison of King Enzo of Sardinia.
- Palazzo del Podestà — on the north side, dating from the 13th century.
- Palazzo dei Banchi — on the eastern flank, begun in 1412 with a ground-floor portico.
Sources
- Basilica di San Petronio, Bologna
- Collezioni Comunali d’Arte, Palazzo d’Accursio
- Museo della Musica, Bologna
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