How many wells are there in Venice, and how do they work?

Venice, a city of bridges, canals, art and beauty, hides a lesser-known treasure beneath its surface: its wells. These “vere da pozzo”, masterpieces of both art and engineering, are scattered across squares and courtyards, silent witnesses to a time when fresh water was a rare and precious resource.

The ingenious water supply system

“Venice is surrounded by water but has none,” wrote Marin Sanudo, historian and senator of the Serenissima Republic, capturing the paradox faced by a city built amid the salty waters of the lagoon. For centuries, Venetians overcame this challenge through a remarkably clever solution: the construction of cistern-wells.

Building one of these wells was a complex and costly endeavour. Workers would dig as deep as five metres below sea level, line the excavation with clay to make it watertight, and fill it with sand brought in from nearby rivers.

At the centre of each well, a shaft made of special bricks filtered rainwater collected from the surrounding stone paving. This system allowed the rain to percolate through the layers of sand, naturally purifying it and making it safe to drink. The construction process could take several months and was so expensive that only the wealthiest families could afford a private well of their own.

Art and engineering in Venice’s wellheads

The vere da pozzo, the protective structures built around wells, are works of art in their own right. Crafted from Istrian stone or marble, and often incorporating repurposed Roman capitals, their shapes and ornamentation evolved over the centuries: from early cubic forms to cylindrical, hexagonal, and octagonal designs, culminating in the richly decorated styles of the Renaissance.

These vere were not merely functional; they also held symbolic value. Noble coats of arms and emblems of the Serenissima adorned the wellheads, reflecting the prestige of the families or institutions that had commissioned them.

Production surged during the Renaissance, a period in which these structures became increasingly elaborate and highly prized.

Ancient trades and water safety

The management of wells gave rise to a variety of traditional professions. The pozzeri were responsible for constructing and maintaining the wells, the acquaroli transported fresh water from rivers, while the piovani held the keys to public wells. Porters were tasked with keeping the wells clean.

Water quality was subject to strict regulation. Wells were opened twice daily at the sound of a bell, and dedicated magistrates oversaw the entire system. By 1858, the city’s technical office reported the existence of thousands of wells, around 6,000 privately owned and nearly 200 public, distributed across the city and its surrounding islands.

The construction of an aqueduct in the 19th century led to a gradual decline in the use of wells. However, around 600 vere da pozzo, the decorative stone wellheads, can still be found around the city. These remain as tangible reminders of a time when human ingenuity and craftsmanship ensured the city’s survival on water.

Many wells were looted over time, particularly during the Austrian occupation, when numerous vere were removed and exported to countries such as Germany and Russia.

Article translated by Agnese Giardini

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Curiosities

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