!!Listed Trivia:

* ActorAllusion: Creator/JeremyIrons [[Film/TheManInTheIronMask playing a priest]].
* DawsonCasting: 23-year-old Holliday Grainger plays Lucrezia, who's 14 in the first episode. 18-year-old Cesare is played by 25-year-old Francois Arnaud, 33-year-old Emmanuelle Chriqui plays a teenage Sancia, and 18-year-old Giulia Farnese is played by 29-year-old Lotte Verbeek (though this last may count as AgeLift; Giulia's age is glossed over to the point where the only thing made clear is that she is ''much'' [[MayDecemberRomance younger than Rodrigo]]).
** Giulia's almost definitely an AgeLift. It's made pretty clear that she's been married to her husband for a good long time--long enough to [[spoiler: conceive a child]] and learn the ways of court and men, as well as politics, on some level. She's definitely not eighteen, and probably isn't supposed to be a teenager, either. It's likely that the characterization is a combo of the real Giulia and Adriana da Mila, Lucrezia's real-life governess/mentor-type figure and a cousin to the Borgia family.
* FanNickname: [[TheScrappy Ursula]] is commonly known as "[[WesternAnimation/SpongebobSquarepants Squidward]]" within the fandom. Rodrigo is often referred to- with [[DracoInLeatherPants great affection]]- as "Papa Pope".
* FakeNationality: Hoo boy. We have Brits playing Italians (Creator/DerekJacobi, Sean Harris, Julian Bleach), Brits playing Spaniards (Creator/JeremyIrons, Holliday Grainger, David Oakes, and Joanne Whalley), a Brit playing a German (Simon [=McBurney=]), a Dutch woman playing an Italian (Lotte Verbeek), a Canadian-American playing an Italian (Colm Feore), a Lithuanian playing an Italian (Ruta Gedmintas), a French-Canadian playing an Italian (Emmanuelle Chriqui), and a French-Canadian playing a Spaniard (Francois Arnaud).
* LyingCreator: If you look at the record, the show runners were this in spades. In two of the more notable examples, they said that they wouldn't go into the Banquet of the Chesnuts because it would be too much "even for Showtime." They did. Then they said they wouldn't go into the [[spoiler: Cesare and Lucretzia incest]] before doing it as well.
* PlayingAgainstType: Ronin Vibert, known for playing the pathetic and timid Lepidus on ''Series/{{Rome}}'', plays Lucrezia's [[MaritalRapeLicense rapist]] husband Giovanni Sforza.
* ScrewedByTheNetwork: Showrunner Creator/NeilJordan had originally planned for the show to last for four seasons like ''Series/TheTudors''. So when Showtime announced that season 3 would be the last, there was an outcry from fans. Jordan later revealed that he had proposed to make a two hour film to wrap up the storyline and give the show a GrandFinale, but Showtime declined, citing high production costs.
* WhatCouldHaveBeen: It was originally supposed to be a film, simply titled ''"Borgia"'', with Creator/ColinFarrell and Creator/ScarlettJohansson as Cesare and Lucrezia, but funding fell through. Director Creator/NeilJordan eventually found the money with the Showtime network, and thus a series was born.

!!Other Trivia:

* Both Creator/JeremyIrons (Rodrigo Borgia) and Colm Feore (Cardinal della Rovere) have played Creator/TomHiddleston's father at one point or another- Irons as Henry IV to Hiddleston's Prince Hal in the BBC's 2012 adaptation of Creator/WilliamShakespeare's Henriad, and Feore as Laufey to Hiddleston's Loki in 2011's ''Film/{{Thor}}''.