But another thread of thought occurred to me and I wondered what your fictional world might consider to be an important historical artefact. Are these artefacts accessible to all or restricted? Are the artefacts magical and their powers still feared? What made people decide to keep these things rather than destroy them?
Who are the custodians of these artefacts? Do they have to take precautions to stop themselves being influenced for good or, especially, evil by being in close contact with these artefacts? What happens should these precautions fail?
Is history treated with importance in your fictional world or is it ignored? How is it taught and if it isn't taught at all what are the reasons for that?
How did the artefacts come into being and how were they discovered?
Just a few thoughts to trigger story ideas...