a surviving memorial of something past.

an object having interest by reason of its age or its association with the past

a museum of historic relics.

a surviving trace of something

a custom that is a relic of paganism.

relics,

remaining parts or fragments.

the remains of a deceased person.

something kept in remembrance; souvenir; memento.

Ecclesiastical . (esp. in the Roman Catholic and Greek churches) the body, a part of the body, or some personal memorial of a saint, martyr, or other sacred person, preserved as worthy of veneration.

a once widespread linguistic form that survives in a limited area but is otherwise obsolete.

noun

antique , antiquity , archaism , artifact , curio , curiosity , evidence , fragment , heirloom , keepsake , memento , memorial , monument , remains , remembrance , remembrancer , reminder , remnant , residue , ruins , scrap , souvenir , survival , testimonial , token , trace , trophy , vestige , oldie , ruin