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![Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse], 1575. Creator: Gian Federigo Bonzagna.](https://d21cmcylgnyv91.cloudfront.net/ej4JTyZD92QlXT7Z90440p7nxRA=/fit-in/224x/2820248.jpg "Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse], 1575. Creator: Gian Federigo Bonzagna.")
![Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse], 1582. Creator: Bartolomeo Argenterio.](https://d21cmcylgnyv91.cloudfront.net/85CzW0arBReTwthvkBVbP9RsEkU=/fit-in/224x/2820008.jpg "Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse], 1582. Creator: Bartolomeo Argenterio.")
![Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse], 1582. Creator: Unknown.](https://d21cmcylgnyv91.cloudfront.net/zbxrQf5ow7He7dvQIy61IAvUl_0=/fit-in/224x/2813233.jpg "Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse], 1582. Creator: Unknown.")
