(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

study of history

historicism

oral history

historic, historical / already-happened, past / former, old, traditional

(dated) Los Angeles (a large city in California, United States)

(obsolete) Washington, D.C. (a city, the capital city of the United States)

Rare spelling of ジュネーヴ. / Rare spelling of ジュネーブ.

(rare) Philadelphia

(obsolete) Sacramento (a city in California, United States)