His choice of numbering indicates that he considered Antipope Benedict X as a legitimate pope.

Each of the three was recognised as legitimate pope by different European powers.

Christopher then had himself elected pope (903-904), and although now considered an antipope, he had until recently been considered a legitimate pope.

In 1432, the university, pursuant to papal and imperial requests, sent two delegates to the Council of Basle who faithfully supported the legitimate pope.

He died probably in 1134, at very advanced age, without making submission to the legitimate pope Innocent II.

Some hold that Christopher was a legitimate pope, regardless of the illegitimate means by which he appears to have ascended to the throne.

In 1139, by the Treaty of Mignano, Roger received the recognition of his kingship from the legitimate pope.

Honorius initially confirmed Eulalius as the legitimate pope.

The city was forced to accept Louis's terms, to acknowledge Clement as the legitimate pope and to aid in the fight against the English.

He supported the legitimate popes and opposed the Ghibellines and their Senate.