who turned katherine into a vampire in vampire diaries
List of The Vampire Diaries characters Katherine Pierce, born Katerina Petrova (based on Katherine von Swartzschild from the novels), was part of a "Traveler" (or Romani) family, and was banished to England after bearing an illegitimate child. Upon meeting Klaus and Elijah, two of the original vampires, she learns that she is a Petrova doppelgänger – which means that she can be sacrificed to release Klaus' werewolf side. She tricked other vampires into turning her, thereby making her useless to Klaus, then spent 500 years running and hiding to escape his wrath. She arrives in Mystic Falls, where both Stefan and Damon Salvatore fall in love with her. She escapes the burning of vampires in the town, and gives the brothers her blood so that they both turn into vampires after being shot. Damon spends 145 years trying to free Katherine from a tomb, though she is not there when he opens it. In the last episode of season one, Katherine returns to Mystic Falls.