....The word 'millionaire,' which is French and means celui qui possede un million d'argent, was invented in the open air in a little street near what's now the Centre Beaubourg in Paris known as the Rue Quincampoix or Quincenpoix in the autumn of 1719."
James Buchan Frozen Desire (1997) p.127
Or, this was where the word 'millionaire' was invented in the Autumn of 1719.