Trivia

• Herself, Isobel Flemming, Rose and Klaus are the only characters thus far to have an episode named after them.
• Nina Dobrev, the actress who plays Katherine Pierce, was born in Bulgaria and speaks Bulgarian.
• Katherine had a daughter at the young age of 16, and was turned into a vampire at age 18 in the year 1492, she is presently the fourth oldest vampire to be revealed (Although she is the second oldest living vampire now). Elijah, and the recently killed Rose and Trevor all predate her although it is still unknown when exactly they were turned into vampires.
• In the books, Katherine von Swartzschild was a German girl who was a vampire of great beauty and kindness, but at the same time, immature, manipulative and selfish. While in the TV series, Katherine Pierce was Katerina Petrova, a Bulgarian girl who was also of great beauty and kindness, but also self-centered and ruthless after she became a vampire. Katherine Pierce and Katherine Von Swartzschild are both selfish, vain, sadistic and manipulative. Both Katherine's from the TV series and the novels had faked their deaths.
• Katherine has been mistaken as Elena by Jenna Sommers on many occasions which resulted in her inviting Katherine into the Gilberts home and been lured into a trap after receiving a frantic call from Elena.
• Rose was the vampire responsible for turning Katherine on the TV series. However, Klaus was the one who turned Katherine into a vampire in the novels, completely changing the back stories of Katherine and Klausfor the series. Klaus felt emotion for Katherine, so he wanted to avenge her death in the novels.
• Katherine was a "birthday gift" from Trevor to Klaus in 1492.
• In the TV series, Katherine is much older than in the books. In the books, Katherine was born in 1614 and turned in 1631, whereas in the TV series, she was born in 1475 and turned in 1492.
• Katherine is German in the books but she is Bulgarian in the TV series.
• Katherine's life is seriously affected by Klaus in books and series. In the books, Katherine Von Swartzschild becomes insane, paranoid, unstable, selfish, cruel, and sadistic because of Klaus's influence for centuries. In the series, Katherine Pierce becomes selfish, cruel, manipulative, and sadistic, because her child was taken away from her against her will, and her family was slaughtered by Klaus.
• When coming into Mystic Falls, Katherine states that she is an orphan who lost her family in a fire (Katherine probably burned her house with her family after they were murdered by Klaus out of respect for them).
• Katherine uses her power of mind control on Jimmy, Matt and Sarah to activate the werewolf curses in firstMason Lockwood and then Tyler Lockwood.
• The difference in physical appearance of Katherine and Elena is the hair. Katherine has curly hair and Elenahas straight hair. The other distinction is their sense of fashion. Elena is more casual and conservative in her dress but Katherine is more sensual and attractive.
• Ironically, Katherine is who replaces Rose (as an ally of Damon and to help him to protect Elena) after her destruction, but doesn't sleep with him because even though she tries, he doesn't want her anymore. This marks another point in the evolution of Damon's Character.
• Katherine wore a lapis lazuli necklace from Lost Girls up until The House Guest, after that she turned her necklace into a bracelet.
• Katherine and Elena both hate each other but they both know that they will need each other in the end.
• In the end, when Katherine betrayed Elena, Damon and Stefan, Isobel betrayed her as well.
• It seems that everybody who meets Katherine Pierce falls in love with her. This is most likely because of her charm and beauty. Vampires and people like Stefan, Damon, Noah, Mason, Trevor and Elijah, have been in love with her. It is said by Klaus that a vampires greatest weakness is LOVE.
• Katherine was the first vampire to be cured of a werewolf bite.
• In the series, only Klaus and Elijah have called Katherine by her real name "Katerina".
• Katherine is the first vampire on the show to be fed on by another vampire.