The Canterbury Tales begins with The General Prologue in which Chaucer describes The Prioress, thus:
“Ful seemly hir winpe pinched was,
hir nose tretys, hir eyen greye as glas,
hir mouth ful small, and therto softe and reed.
But sikerly she had a fair forheed-
it was almost a spanne brood, I trowe- for hardily
she was nat undergrowe.
Ful fetis was hir cloke, as I was war.
Of small coral about hire arm
she bar a piere of bedes, gauded al with grene;
an theron heng a broche of gold ful shene,
an which there was first write a crown A,
And after, amor vincit omnia.”
The earliest reference to the romantic phrase--arranged as Omnia vincit Amor--originally appeared in Eclogue X of the Eclogues, a series of poems by Virgil (70 BC - 19 BC).