- Pozzo di San Patrizio
This well was commissioned in 1527 by Pope Clement VII and designed by Antonio da Sangallo the Younger. - Pozzo di San Patrizio
There are 70 windows in the well. - Pozzo di San Patrizio
The well has is 62 m deep and has double-helical stairs around it. - Piazza del Popolo
Well, now ... There must be another way of renovating windows, right?