Pope Gregory IV died on January 25, 844.
Gregory IV of Naples died in 915.
Gregory IV of Athens died in 1829.
Pope Gregory IV died on 844-01-11.
Pope Gregory IV was the head of the Catholic Church from October 827 to his death on January 25, 844 AD.
There were about 20 popes with the name Gregory, be more specific eg Pope Gregory iV
Pope Gregory VII
Pope Gregory VII
Henry refused to obey Gregory also when Gregory accepted the new king Henry went to war Gregory allies drove out Henry forces
. Emperor Henry IV
emporer Henry IV
It was popularized during the reign of Gregory IV
Pope Gregory died leaving Henry iv to do as he pleased