The 1758 papal conclave, convoked after the death of Pope Benedict XIV, elected Cardinal Carlo Rezzonico of Venice, who took the name Clement XIII.

Jus exclusivae was the right claimed by several Catholic monarchs of Europe to veto a candidate for the papacy. Although never formally recognized by the Catholic Church, the monarchs of France, Spain and Austria claimed this right at various times, making known to a papal conclave, through a crown-cardinal, that the monarch deemed a particular candidate for the papacy objectionable.