During the pontificate of Celestine III he was not involved in church government and had time to write the works On the Miserable Condition of Man and On the Mysteries of the 
During the pontificate of Celestine III he was not involved in church government and had time to write the works On the Miserable Condition of Man and On the Mysteries of the Mass. He believed he had a right to reject candidates for Holy Roman Emperor, as in the case of Henry VI. Excommunicating John of England for refusing to accept Stephen Langton as Archbishop of Canterbury, he received John's territory and returned it to him as a papal fief. For 10 points, who is this 13th-century pope who inaugurated the Mendicant orders?
During the pontificate of Celestine III he was not involved in church government and had time to write the works On the Miserable Condition of Man and On the Mysteries of the Mass.
{Innocent III} or {Lothair of Segni} or {Big Daddy Muffin}