The Thirty-Sixth Canto moves far differently than the previous one. The style is archaic, though it strikes me as more recent than the Renaissance style of earlier Cantos. Seventeenth century perhaps. Though it ends with a discussion of medievalism, including what I take to be a reference to Charles I of Anjou, who was the King of Sicily and Naples and Count of Anjou and Provence (there is a long history of French adventurers seizing for themselves some duchy or the like in a very disjointed medieval Italy), so perhaps assigning a time period to what Pound is attempting is pointless?

Cometh he to be
                 when the will
From overplus
Twisteth out of natural measure,
Never adorned with rest  Moveth he changing colour
Either to laugh or weep
Contorting the face with fear
                    resteth but a little