1875: John Henry Newman, A Letter Addressed to His Grace the Duke of Norfolk: On Occasion of Mr. Gladstone’s Recent Expostulation, page 26 (The Catholic Publication Society)The Tracts for the Times were founded on a deadly antagonism to what in these last centuries has been called Erastianism or Cæsarism.
1910: Gilbert Keith Chesterton, What’s Wrong with the World, page 134 (Dodd, Mead and Company)This popular philosophy is utterly despotic and anti-democratic; this fashion is the flower of that Cæsarism against which I am concerned to protest.