Mathias Kindlinger (1892 – July 30, 1964), known as The Bluebeard of Schrems (German: Der Blaubart von Schrems), was an Austrian murderer and suspected serial killer who was convicted of killing his first and fifth wives in 1927 and 1961, respectively, but is alleged to have been responsible for the deaths of three other women as well. He was never charged in the other murders and was instead sentenced to life imprisonment for the final murder, dying behind bars in 1964.