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![On April 10, 847, Pope St Leo IV was unanimously elected and installed as Pontifex Maximus of the Catholic Church. – Italian Art Society On April 10, 847, Pope St Leo IV was unanimously elected and installed as Pontifex Maximus of the Catholic Church. – Italian Art Society](https://www.italianartsociety.org/wp-content/uploads/2020/10/172791919135_4.jpg)
On April 10, 847, Pope St Leo IV was unanimously elected and installed as Pontifex Maximus of the Catholic Church. – Italian Art Society
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