According to some, these doggerel verses, current on the
occasion, were extemporised by Cardinal John in the pious exuberance of
his glee: -
"Papatus munus tulit Archidiaconus unus
Quem Patrem Patrum fecit discordia Fratrum."
The Archdeacon, a man of great weight of character, in consequence of
differences with his Bishop (of Liege), who was a disorderly liver, had
gone to the Holy Land, and during his stay there he contracted great
intimacy with Prince Edward of England (Edward I.). Some authors, e.g.
John Villani (VIII. 39), say that he was Legate in Syria; others, as
Rainaldus, deny this; but Polo's statement, and the authority which the
Archdeacon took on himself in writing to the Kaan, seem to show that he
had some such position.
He took the name of Gregory X., and before his departure from Acre,
preached a moving sermon on the text, "If I forget thee, O Jerusalem,"
etc. Prince Edward fitted him out for his voyage.
Gregory reigned barely four years, dying at Arezzo 10th January, 1276.