Very Authentic! When I first watched this series it was if I was actually in the Elizabethan Era! Glen Jackson's performance masterfully displays Elizabeth I's personality, she was sharp, short-tempered, cunning, etc. Elizabeth Waller's designs for the show is just stunning absolutely the best for a series. I've watched this many times because this is just too remarkable to only watch once. Many television shows of Elizabeth I try and fail to depict Elizabeth I life and reign, but this one is not like the others it is unique, fabulous, stunning, and obviously absolutely Authentic!