Trivia: Although they didn't have any scenes together, Kevin McKidd (Vorenus) and Tobias Menzies (Brutus) would discuss their characters and brainstorm about how to portray them, because they felt their characters went through very similar moral conflicts. Confirmed by Kevin McKidd on the season one DVD commentary.
Trivia: Pompey Magnus had two sons that fought against Caesar: Cnaeus and Sextus. He never had a son named Quintus as is stated in the series.
Trivia: Series 2: Death Mask Herod's "gift" of 20,000 pounds of gold would be work about $290 million in today's money (20 thousand pounds = 320 million ounces x US$905.00 = US$290 million). However this amount of gold would have had much more purchasing power in the 1st Century BC than today as inflation was virtually unknown in Rome at that time. This is further demonstrated in that it was sufficient to purchase a whole country, Judea. As Marc Antony said "a good morning's work".
Trivia: Atia's character traits on the show were loosly based on those of Fulvia, Marc Antony's third wife. Servilia's role in the conspiracy to kill Caesar on the show was inspired by that of Brutus' wife Porcia. Confirmed on the DVDs.