The molecules in my body aren't the ones I'm born with and hopefully won't be the ones I die with. Which ones are my molecules? Is it transitory so the only molecules that are me are the ones in my body right this very moment, in that case don't I cease being in the instant both before and after the present?

What makes me me? And what makes that me recognisable? Does an image count? Or a description? Does it have to be the specific arrangement of molecules that exist only in the present mentioned earlier?

Sure you can't find attila or Michelangelo but does that mean they don't exist? You've mentioned their names, they're in that sense recognisable.