Question: who turned katherine into a vampire in vampire diaries

title: List of The Vampire Diaries characters
text: 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 . 

Answer: answer: Katherine Pierce tricked other vampires into turning her , thereby making her useless to Klaus , then spent 500 years running and hiding to escape his wrath .
answer: In The Vampire Diaries, Katherine Pierce tricked other vampires into turning her into a vampire.