the dark ages
/ðə ˈdɑːk eɪdʒɪz/
/ðə ˈdɑːrk eɪdʒɪz/
Etymology
LatinItalianEnglish
The phrase 'the Dark Ages' was first used in English in the early 17th century by historians who looked back at the period after Rome's fall and saw a time of cultural darkness compared with the classical world. The word 'dark' here means 'unknown' or 'obscure', a translation of the Latin 'saeculum obscurum' used by the Italian scholar Petrarch in the 1300s. The metaphor caught on and later expanded to any backward or undeveloped period in any field.