Pope Gregory IV was the head of the Catholic Church from October 827 to his death on January 25, 844 AD.
Pope Gregory IV ruled from 827 to January 844.
Pope Gregory IV died on 844-01-11.
Pope Gregory IV died on January 25, 844.
There were about 20 popes with the name Gregory, be more specific eg Pope Gregory iV
Pope Gregory VII
Pope Gregory VII
Pope Gregory died leaving Henry iv to do as he pleased
. Emperor Henry IV
Henry IV of Germany told him to resign. In exchange, Gregory excommunicated Henry and remained as pope.
Henry lV violated the pope's orders.
emporer Henry IV
It's because Henry's nobles supported Gregory, and the reason why Henry begged the Pope was because he said the Pope had no real authority.