Exactly, people still read books by Plato and Aristotle.

How about a million years?

Focus on leaving a high fidelity fossil.

There's some interesting developments in that area, on the one side about leaving warnings at nuclear waste sites (which probably won't work, archeologists were warned about death and curses and such and still went into Tutanchamun's tomb. IIRC some died from a mold spore active in there), on the other about preserving knowledge for the ages (e.g. sapphire disks, 3d / holographic storage). I don't feel like there's a working solution yet, or at least not a high-tech one - chipping out a granite block and keeping it relatively shielded from the weather still seems like the safest bet.

> archeologists were warned about death and curses and such and still went into Tutanchamun's tomb. IIRC some died from a mold spore active in there

Correct. I saw a documentary last week about a 3000-year-old grave in Syria where they pumped in fresh air for a week or so before going in to get rid of the fungal spores in the air.

https://en.wikipedia.org/wiki/Curse_of_the_pharaohs

The first people making a fosselfie would make a dent for sure. In the rock.