locus classicus

 
Pronunciation: /ˌləʊkəs ˈklasɪkəs, ˌlɒkəs/

noun (plural loci classici /ˌləʊsʌɪ ˈklasɪsʌɪ, ˌlɒkiː ˈklasɪkiː/)

  • a passage considered to be the best known or most authoritative on a particular subject.

Origin:

Latin, literally 'classical place'