![It's Leap Year, & Here's Why! February 24, 1582: Pope Gregory XIII Issues the Proclamation, Inter Gravissimas, & A Commentary by Fr. Richard Kunst – Papal Artifacts It's Leap Year, & Here's Why! February 24, 1582: Pope Gregory XIII Issues the Proclamation, Inter Gravissimas, & A Commentary by Fr. Richard Kunst – Papal Artifacts](https://www.papalartifacts.com/wp-content/uploads/2016/05/1326026267_gregory13coa.jpg)
It's Leap Year, & Here's Why! February 24, 1582: Pope Gregory XIII Issues the Proclamation, Inter Gravissimas, & A Commentary by Fr. Richard Kunst – Papal Artifacts
![a Portrait of Pope Innocent III (thirteenth century fresco), Monastery... | Download Scientific Diagram a Portrait of Pope Innocent III (thirteenth century fresco), Monastery... | Download Scientific Diagram](https://www.researchgate.net/publication/331050366/figure/fig1/AS:961846798475297@1606333555555/a-Portrait-of-Pope-Innocent-III-thirteenth-century-fresco-Monastery-of-St-Benedict_Q640.jpg)
a Portrait of Pope Innocent III (thirteenth century fresco), Monastery... | Download Scientific Diagram
![Pope Gregory XIII (January 7, 1502 - April 10, 1585), born Ugo Boncompagni, was Pope from 1572 to 1585. He is best known for commissioning and being the namesake for the Gregorian Pope Gregory XIII (January 7, 1502 - April 10, 1585), born Ugo Boncompagni, was Pope from 1572 to 1585. He is best known for commissioning and being the namesake for the Gregorian](https://l450v.alamy.com/450v/jx3560/pope-gregory-xiii-1502-10-april-1585-was-pope-of-the-catholic-church-jx3560.jpg)