A little window onto Bologna's hidden canal
Photo: Adam Gritco · Unsplash License
Why go
Bologna was once a city of water. Its canals turned millstones and fed a district of mills and silk mills, and when electricity spread and hygiene rules tightened they came to be seen as open sewers and were covered over. The stretch you see from Via Piella escaped the coverings carried out between the 1930s and the 1950s. Long before that, it served as the defensive moat of the second city wall, built in the 11th century.
The view itself is simple: houses rising beside the water, shutters and windows above a slow current. Look for traces of the past. The civic plaque recalls private washhouses on drawbridges, with wooden platforms over the water and tubs where washerwomen rinsed laundry without getting wet. Bologna's library service describes this view as the Canale delle Moline, the canal of the city's mills.
Gallery
Photo: Adam Gritco · Unsplash License
Photo: Ekaterina Bogdan · Unsplash License · source
Photo: Iva Siljanovska · Pexels License · source
Photo: Vasw K · Pexels License · source
Highlights
The 'finestrella' is a small opening in a wall on Via Piella, filed by the civic plaque scheme under the Canale di Reno at Piella. Through it the canal runs between houses, one of the few places in the historic centre where Bologna's waterways are still open to the sky. Views onto the canal like this one have been restored in recent years.
Before mills and washhouses, this water had a military role. The civic plaque on Via Piella explains that the canal served as the defensive moat of Bologna's second circle of walls, built in the 11th century. Standing at the window, you are looking at what was once the outer edge of the walled city, now hidden among houses.
In Via Capo di Lucca, where the Canale delle Moline also runs, the houses at numbers 9 to 25 were built from 1516 by the Università delle Moline e delle Moliture. Millers lived there and worked the grain millstones driven by the canal's water. The civic plaque at Via Capo di Lucca 2/4 marks the spot, beside an old sluice wheel on the canal's edge.
Practical information
From the official website:
The window is on a public street, Via Piella.
Free.
Checked on the official sources in November 2026. Hours can change on holidays: check the official website before you go.
Getting there
Via Piella is in the historic centre, and the window is at street level on the public street.
TPER city buses serve the edge of the historic centre. Plan your route with TPER's journey planner and buy tickets in TPER's official ROGER app.
The historic centre is a camera-controlled limited-traffic zone (ZTL). Leave the car in a car park outside the centre and walk in, or ask your hotel how access works.
Insider tips
The finestrella is a little window, so only one or two people can look through it at a time. If a small queue forms, wait your turn, take your photo and step aside for the next person: everyone gets the same view.
Continue to Via Capo di Lucca to see the millers' houses at numbers 9 to 25, built from 1516 by the millers' guild, and the old sluice wheel on the edge of the Canale delle Moline.
The canal looks different at night, when light from the surrounding windows falls on the water. If you pass through Via Piella again in the evening, stop for a second look: it is a free view, and it takes only a minute.
In the centre
Historic-centre restaurants and hotels from the Bologna City Guide, each with its own Holiplanet page.
Historic restaurant
Tortellini in brodo and lasagne verdi since 1909
Discover more →Traditional restaurant
Handmade tortellini and tagliatelle in Bologna since 1948
Discover more →Chef's restaurant
Mario Ferrara's Lucanian-rooted cooking in a 1600s convent
Discover more →Wine bar / osteria
Wine osteria since 1465: bring your own food
Discover more →Hotel
Romantic 3-star hotel in the ancient Quadrilatero
View hotel →Boutique hotel
12th-century building facing San Petronio's Gothic windows
View hotel →Unique stay
Sleep inside a 12th-century tower, sixty metres above Bologna
View hotel →All restaurants on the Bologna map → All hotels on the Bologna map →
Questions
It is a small window in a wall on Via Piella that opens onto a stretch of canal running between houses. The canal survived the coverings of Bologna's waterways carried out between the 1930s and 1950s, and in the Middle Ages it served as the defensive moat of the city's second wall.
Yes. The window is set in a wall on a public street, so there is no ticket and nothing to book. Simply walk to Via Piella in the historic centre, look through the window and give the next person their turn, especially when several visitors arrive together.
Bologna's library service describes the view as the Canale delle Moline, the canal of the city's mills. The civic plaque on Via Piella files the spot under the Canale di Reno at Piella. Either way, it is one of the few stretches of the city's canals still open to the sky.
After electricity spread and hygiene rules became stricter, the canals were regarded as open sewers and were covered over, according to Bologna's civic library. The stretch seen from Via Piella survived the coverings carried out between the 1930s and the 1950s, which is why the window is so special.
