Antipope Philip was pope

Pope

The Pope is the Bishop of Rome, a position that makes him the leader of the worldwide Catholic Church . In the Catholic Church, the Pope is regarded as the successor of Saint Peter, the Apostle...

 for only one day (July 31, 768). The subject of others' intrigues rather than active on his own account, he was a chaplain in a monastery at Rome. The sometime papal Chancellor

Chancellor

Chancellor is the title of various official positions in the governments of many nations. The original chancellors were the Cancellarii of Roman courts of justice—ushers who sat at the cancelli or lattice work screens of a basilica or law court, which separated the judge and counsel from the...

, Christophorus, had sought Lombard

Lombards

The Lombards , also referred to as Longobards, were a Germanic tribe of Scandinavian origin, who from 568 to 774 ruled a Kingdom in Italy...

 help to depose Pope Constantine II

Antipope Constantine II

Antipope Constantine II was an antipope in 767 and 768.He was born in Nepi near Viterbo, a scion, along with his three brothers, of noble Roman family....

, who was the candidate of the military faction in Rome. When Constantine was taken captive, Waldipert, acting as the envoy of the Lombard king Desiderius

Desiderius

Desiderius was the last king of the Lombard Kingdom of northern Italy...

, accompanied Christophorus' brother Sergius in an attack on Rome that ended Constantine's papacy. Waldipert then installed Philip as Pope. Christophorus, on learning of this, stated that he would not enter Rome until Philip was removed. Philip was forced to return to his monastery. Christophorus entered Rome and oversaw the election of Stephen III

Pope Stephen III

Pope Stephen III was pope from August 1 or August 7, 768 to January 24, 772. He was a native of Sicily.He came to Rome during the pontificate of Gregory III and gradually rose to high office in the service of successive popes....

.