Gregory IV of Athens died in 1829.
Gregory IV of Naples died in 915.
Pope Gregory IV died on January 25, 844.
Pope Gregory IV died on 844-01-11.
Gregory Rentis was born on November 10, 1984, in Athens, Greece.
Pope Gregory IV was the head of the Catholic Church from October 827 to his death on January 25, 844 AD.
Henry refused to obey Gregory also when Gregory accepted the new king Henry went to war Gregory allies drove out Henry forces
There were about 20 popes with the name Gregory, be more specific eg Pope Gregory iV
Pope Gregory VII
Pope Gregory VII
. Emperor Henry IV
emporer Henry IV
It was popularized during the reign of Gregory IV