Antique - Wikipedia.
In 1979, the British art critic Edward Lucie-Smith wrote that Antique-dealers" sometimes insist that nothing is antique which was made after 1830, although the barrier has been broken down in recent years by the enthusiasm of collectors for Art Nouveau and Art Deco.
Antique Definition Meaning - Merriam-Webster.
2 a: being in the style or fashion of former times antique manners and graces. b: made in or representative of the work of an earlier period antique mirrors also: being an antique. 3: selling or exhibiting antiques an antique show.