When over 200 meters of a street close to Florence’s famous Ponte Vecchio collapsed in May 2016, the alarm bells started ringing. The sinkhole, caused by a broken pipe, swallowed about 30 vehicles, but fortunately nobody was hurt. However, the municipal authorities became seriously concerned about the stability and integrity of this symbolic monument. The current bridge was built in the 14th century, although there are vestiges of previous constructions going back to Roman times. As well as receiving millions of visitors every year, the Ponte Vecchio has a number of shops and in its recent history has survived floods, fire outbreaks and even the trend of hanging padlocks from its balconies (over 5,000 of them were removed in 2006). How can you guarantee the stability and integrity of a monument that has been subjected to so many stresses for more than six centuries?