late 14c., "olden times," from O.Fr. antiquitet (11c.; Mod.Fr. antiquité), from L. antiquitatem (nom. antiquitas) "ancient times, antiquity," noun of quality from antiquus (see antique). Specific reference to ancient Greece and Rome is from mid-15c.; meaning "quality
of being old" is from about the same time. Antiquities "relics of ancient days" is from 1510s.