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Pozzo di San Patrizio Orvieto — scala elicoidale rinascimentale
1537 Year of completion

Orvieto · Umbria · Italy

St Patrick's
Well

A Renaissance marvel · from 1527 to 1537

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Orvieto's Underground Marvel

A masterpiece of engineering
in the heart of Umbria

Commissioned by Pope Clement VII in 1527 after the Sack of Rome and designed by the architect Antonio da Sangallo the Younger, St Patrick's Well descends more than fifty-three metres into the heart of Orvieto's tufa rock. Its double helix staircase — two independent ramps of 248 steps each, lit by 72 windows — is still regarded as one of the most ingenious engineering solutions of the Italian Renaissance. As early as the late-eighteenth-century guidebooks it was called, after the Cathedral, the second marvel of Orvieto.

"Quod natura munimento inviderat,
industria adiecit"

What nature had denied as a defence, ingenuity supplied
53 metres Depth
248 steps Per staircase
72 windows Internal
1537 year Completion
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