Clement III is succeeded on March 21,…
March 1191 CE
Clement III is succeeded on March 21, 1191, by Celestine III.
Lotario de'Segni, born of a noble family and educated at Paris and Bologna where he studied theology and canon law, serves in the court of his uncle, Celestine.
Appointed cardinal—at thirty, the youngest of his day—in 1190, de'Segni has already formulated his own theory of papal power, positing that secular rulers must be subject to the pope just as the body must be subject to the spirit.
He will have occasion to use this power in 1198, when he ascends the papal throne as Innocent III.