https://www.fromrome.info/2025/10/22/pope-nicholas-ii-how-he-changed-the-papacy-forever-in-1059/
Pope Nicholas II & how he changed the Papacy forever in 1059 | From Rome
Oct 23, 2025 - Editor's Note: This video, made 4 years ago, though it contains a few errors, such as saying that Nicholas II put together an army to take back Rome -- when in...
pope nicholas iithe papacyfrom romechangedforever
https://en.wikisource.org/wiki/Catholic_Encyclopedia_(1913)/Pope_Nicholas_II
Catholic Encyclopedia (1913)/Pope Nicholas II - Wikisource, the free online library
pope nicholas iicatholic encyclopediathe freeonline librarywikisource