One of the mysteries of the English language finally explained.
On behalf of religion and domestic life.
Late 16th century; earliest use found in Thomas Nashe (d. c1601), writer. From classical Latin prō ārīs et focīs, lit. ‘for altars and hearths’ from prō + ārīs, ablative plural of āra altar + et and + focīs, ablative plural of focus hearth, fireplace, sacrificial hearth.
pro aris et focis/ˌprəʊ ˈɑːriːs ɛt ˈfəʊkiːs/
In this article we explore how to impress employers with a spot-on CV.