On 11 May 1670, Emilio Bonaventura Altieri was crowned as Pope Clement X.
In his six year papacy, Clement X canonized several saints including Rose of Lima; beatified John of the Cross; and provided much support to Polish King Jan Sobieski.
However his relationship with French king Louis XIV was not so good, especially concerning the matter of the regalia. Louis XIV sought to claim the authority to make appointments to ecclesiastical positions and to manage the incomes of vacant episcopal sees and abbeys contrary to the opinion of Clement X and his successors. This would mark the beginning of an intense struggle between the papacy and Louis XIV regarding the relationship and authority of the Church and the secular power.