antiquarian (n.)

"one who studies or is fond of antiquities, one versed in knowledge of ancient things," c. 1600, with -an + Latin antiquarius "pertaining to antiquity," from antiquus "ancient, aged, venerable" (see antique (adj.)). In later use more specifically "collector of antiquities; dealer in old books, coins, objects of art, etc." As an adjective, "pertaining to antiquaries," from 1771. Compare antiquary.