The Contested Election of Pope Alexander III (1159)
On September 7, 1159, a majority of the College of Cardinals elected Cardinal Rolando Bandinelli as pope, and he took the name Alexander III. Within hours, a rival minority faction elected Cardinal Octaviano Monticelli as Antipope Victor IV, plunging the Catholic Church into a schism that would last nearly two decades and entangle the papacy in a bitter power struggle with the Holy Roman Empire.
A Divided Conclave
The death of Pope Adrian IV on September 1, 1159, left the papacy vacant at a moment of intense political tension between the Church and Holy Roman Emperor Frederick Barbarossa. Adrian had clashed repeatedly with Frederick over imperial authority in Italy, and the cardinals who gathered to choose his successor were sharply divided along these same lines. Rolando Bandinelli, a Sienese-born canon lawyer and theologian who had served as Adrian's chancellor, represented the faction determined to resist imperial encroachment on papal independence. On September 7, 1159, a clear majority of cardinals elected him pope, and he chose the name Alexander III, signaling continuity with earlier reform-minded pontiffs. A smaller pro-imperial faction, however, refused to accept the result. Loyal to Frederick Barbarossa's interests, they simultaneously elected Cardinal Octaviano Monticelli, who took the name Victor IV. The dual election immediately raised the question of legitimacy: canon law required a two-thirds majority, and Alexander's supporters insisted he had met that threshold while Victor's backers disputed the count. Both men were consecrated within days of each other, setting the stage for a prolonged and destabilizing schism that would test the loyalties of kings, bishops, and city-states across Europe.
Did You Know?
The chaos of the 1159 election was so influential that its solution—a mandatory two-thirds majority vote by cardinals—is still the rule used to elect popes today, including in the modern Sistine Chapel conclaves.
The Papal Schism and Frederick Barbarossa
Emperor Frederick Barbarossa quickly threw his support behind Victor IV, convening a synod at Pavia in February 1160 that formally recognized Victor as the legitimate pope and excommunicated Alexander III. Alexander, forced into exile from Rome, spent much of the following years in France, where King Louis VII offered him protection and recognition, as did King Henry II of England. This gave the schism a broader European dimension, pitting the empire against a coalition of Western European monarchies and reform-minded clergy who saw Alexander as the rightful pontiff. Victor IV died in 1164, but Frederick's faction refused to concede, elevating successive antipopes—Paschal III and then Callixtus III—to continue the opposition through the 1160s and into the 1170s. The conflict became entwined with Frederick's broader campaign to assert imperial dominance over northern Italy, where the Lombard League of city-states aligned itself with Alexander against the emperor. The turning point came after Frederick's decisive military defeat at the Battle of Legnano in 1176, which forced him to negotiate. The resulting Peace of Venice in 1177 saw Frederick formally recognize Alexander III as pope and kneel before him in a public act of submission at St. Mark's Basilica, effectively ending the eighteen-year schism.
Legacy of a Reforming Pope
Despite the turmoil of his contested election, Alexander III presided over one of the most consequential pontificates of the twelfth century. In 1179, he convened the Third Lateran Council, which introduced the rule requiring a two-thirds majority of cardinals for a valid papal election—a direct response to the chaos of 1159 that remains the foundation of papal election procedure to this day. The council also addressed clerical discipline, simony, and the treatment of heretics, cementing Alexander's reputation as a skilled canon lawyer and administrator. His pontificate was also marked by his involvement in the dispute between King Henry II of England and Archbishop Thomas Becket of Canterbury; following Becket's murder in 1170, Alexander canonized him as a saint in 1173, reinforcing the Church's claim to independence from secular rulers. Alexander III died on August 30, 1181, having outlasted four antipopes and an emperor's sustained opposition. His victory affirmed the principle that papal elections belonged to the College of Cardinals alone, free from imperial interference, and his reforms shaped the institutional structure of the Catholic Church for centuries afterward.