It's the kind of thing the Time Lord "Doctor Who" would understand. Timelines - time and place - what is - what can be - what's supposed to be - and what happens is always exactly what is supposed to happen because someone like Doctor Who makes sure of it! And yet, nothing is ever truly fixed because this whole universe is like this big jigsawpuzzle - pieces, lots of different pieces (but always exactly the same number) that are continually being rearranged in slightly different ways and so I'm sure if I can just find the way to put the right pieces back in the puzzle in the right order it must be possible to restore that point in time.
The photograph is the Ponte Vecchio in Florence, Italy. It's still there.