A quick flick through the on-line official historical archives of the Touraine revealed that the old stone bridge of Tours was washed away on 9th April, 1978. And this was not the first time it had been destroyed by the force of the River Loire. It was washed away once before in 1789 ~ probably weakened by the winter flooding of 1788/89: see Loire in Flood.
Do click any of the links on this page to find out more about this and other historical events.
Source of images: Archives départmentales d’Indre-et-Loire