Any such project can only use engineering to provide assurance that the result should last that long _if_ no-one destroys it.
I think once something is more than a few hundred years old then humans will automatically try to preserve it unless there's a good reason not to (reuse of scarce resources, ideological issues, etc). The challenge is getting something to last long enough for our innate desire to preserve history to kick in.
This is a very recent development that started circa the 19th century in Europe.
Before that no-one really cared.
Would ISIS's destruction of a few World Heritage Sites, museums, art galleries, etc. fall under "ideological issues"
https://amp.cnn.com/cnn/videos/world/2015/08/25/isis-destroy...