There was constant friction with the pontificate of the Spanish Cardinal Pamphilj, elected Pope on 15 September 1644 as Innocent X. Mazarin protected the Barberini cardinals, nephews of the late Pope, and the Bull against them was voted by the Parlement of Paris "null and abusive"; France made a show of preparing to take Avignon by force, and Innocent backed down. Mazarin was more consistently an enemy of Jansenism, in particular during the formulary controversy, more for its political implications than out of theology. On his deathbed he warned young Louis "not to tolerate the Jansenist sect, not even their name." After his death, Louis XIV did not appoint a new principal minister and instead governed himself, marking the beginning of a new era of centralized government in France.