[[quoteright:330:[[ComicStrip/CalvinAndHobbes http://static.tvtropes.org/pmwiki/pub/images/tyrannosaur_in_f-14.jpg]]]]
[[caption-width-right:330:''"[[CoolButStupid Tyrannosaurs in F-14s!]]"'']]

->"''Spare me your space-age {{technobabble}}, AttilaTheHun!''"
-->-- '''Zapp Brannigan''', ''WesternAnimation/{{Futurama}}''

Stories often confuse two or more time periods. For example, Renaissance dress may appear with 12th-century crusaders in a story set in Charlemagne's empire. Imperial Roman troops might have guns. Cavemen might be fightings [[ArtisticLicensePaleontology Dinosaurs]] to survive. This is [[OlderThanTheyThink not only a modern trope]]. Medieval artists, for example, routinely dressed Biblical figures in contemporary fashions, and the Greek myth of Theseus features similar confusion. Some critics think the very first writer to actually try to reconstruct past times as different from the current era was Sir Creator/WalterScott.

This has a number of more-particular variations:

* ArtisticLicensePaleontology: The biological version of this trope.
* LowCultureHighTech: Low tech culture using far advanced technologies it doesn't understand.
* FontAnachronism: When creators use fonts in their works that weren't even invented yet.
* FutureImperfect
* PurelyAestheticEra
* PresentDayPast
* PoliticallyCorrectHistory
* RealityIsUnrealistic: The producers get the period right, but are criticized because it's not what the audience was expecting.
* SchizoTech: The mix of technologies purposefully makes very little sense.
* SteamNeverDies

%%If you have time, please take time to put examples in alphabetical order. This page Administrivia/HowToAlphabetizeThings should help you with that.
!!Examples from:
* AnachronismStew/AnimeAndManga
* AnachronismStew/{{Art}}
* AnachronismStew/AudioPlay
* AnachronismStew/ComicBooks
* AnachronismStew/FanFic
* AnachronismStew/FilmsUsingRuleOfFunny
* AnachronismStew/FilmsWithNoGoodExcuse
* AnachronismStew/{{Literature}}
* AnachronismStew/LiveActionTV
* AnachronismStew/{{Music}}
* AnachronismStew/{{Pinball}}
* AnachronismStew/{{Radio}}
* AnachronismStew/RealLife
* AnachronismStew/TabletopGames
* AnachronismStew/{{Theater}}
* AnachronismStew/VideoGames
* AnachronismStew/VisualNovels
* AnachronismStew/WebComics
* AnachronismStew/WebOriginal
* AnachronismStew/WesternAnimation
* AnachronismStew/{{Roleplay}}