Investigations reveal the San Niccolò Tower-Gate's masonry is well-constructed, indicating high preservation quality.
The San Niccolò’ Tower-Gate in Florence, designed by Andrea dell'Orcagna, was built in 1328 as part of the third ring of the city walls of Florence. In the frame of a conservation project promoted by the Municipality of Florence, the Department of Earth Sciences of the University of Florence conducted a series of studies, using NDT techniques, to characterize the tower's masonry. Based on geological, seismic, georadar, sonic, and scleometric investigations, the Tower's masonry was found to had been excellently constructed and, after eight centuries, remains in good condition.
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Coli et al. (2025) studied this question.
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