|←Author Index: Gr||Pope Gregory XIV
|Born Niccolò Sfondrati, was Pope from 5 December, 1590 until his death in 1591.|
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Works about Pope Gregory
- "Gregory XIV." in the Encyclopædia Britannica, 9th ed.
- "Gregory XIV." in the Encyclopædia Britannica, 11th ed.
- “Pope Gregory XIV,” in Catholic Encyclopedia, 1913.