The famous Arno city of Florence has been plagued with floods for centuries.  Walking through the city, you will find many plaques on buildings, showing you the heights the water reached.  It is sobering, to say the least.

On the front of the Pazzi Chapel, to the far left side, two high water marks point out the incredible heights reached in 2 remarkable years.

See those 2 small white rectangles on the left of the pilaster?  Those mark the flood heights.

Zeroing in…

Zeroed in:  you can see the 1966 flood reached the highest level marked.  The lower one (which is still pretty high!) is from 1557 if my reading of the Roman numerals is correct.  The time spans in Italy will always blow my mind!