![Pope Gregory IV; Gregory Quartus; Liber chronicarum. A flower celk with a pope. He wears a tiara and has a book and a staff with a double cross in his hands. The Pope Gregory IV; Gregory Quartus; Liber chronicarum. A flower celk with a pope. He wears a tiara and has a book and a staff with a double cross in his hands. The](https://www.superstock.com/cdn/6145/Comp/6145-46389555.webp)
Pope Gregory IV; Gregory Quartus; Liber chronicarum. A flower celk with a pope. He wears a tiara and has a book and a staff with a double cross in his hands. The
![A 9th century depiction of the Pope at that time. Because of his youthful appearance, it is thought to be Gregory IV who became Pope aged 37 and sat on the Papal A 9th century depiction of the Pope at that time. Because of his youthful appearance, it is thought to be Gregory IV who became Pope aged 37 and sat on the Papal](https://c8.alamy.com/comp/WA4C9R/a-9th-century-depiction-of-the-pope-at-that-time-because-of-his-youthful-appearance-it-is-thought-to-be-gregory-iv-who-became-pope-aged-37-and-sat-on-the-papal-throne-until-25-jan-844-he-was-originally-the-cardinal-priest-of-the-basilica-of-st-mark-in-rome-WA4C9R.jpg)
A 9th century depiction of the Pope at that time. Because of his youthful appearance, it is thought to be Gregory IV who became Pope aged 37 and sat on the Papal
![Gregory IV (born in Rome) (died 25 January 844 ibid) was Pope from 827 to 844, Historical, digitally restored reproduction from a 19th century original, Gregory IV (born in Rome) (died January Gregory IV (born in Rome) (died 25 January 844 ibid) was Pope from 827 to 844, Historical, digitally restored reproduction from a 19th century original, Gregory IV (born in Rome) (died January](https://www.superstock.com/cdn/1848/Comp/1848-49169646.webp)
Gregory IV (born in Rome) (died 25 January 844 ibid) was Pope from 827 to 844, Historical, digitally restored reproduction from a 19th century original, Gregory IV (born in Rome) (died January
![Novellae of Pope Innocent IV and Decretales of Pope Gregory IX cum glossis collection, “f.79r, Pope hearing a petition - c. 1278 (detail).“ - Postej & Stews Novellae of Pope Innocent IV and Decretales of Pope Gregory IX cum glossis collection, “f.79r, Pope hearing a petition - c. 1278 (detail).“ - Postej & Stews](https://i0.wp.com/postej-stew.dk/wp-content/uploads/2019/05/Novellae-of-Pope-Innocent-IV-and-Decretales-of-Pope-Gregory-IX-cum-glossis-collection-%E2%80%9Cf.79r-Pope-hearing-a-petition-c.-1278-detail.%E2%80%9C.jpg)