Karl Landsteiner

Karl Landsteiner was an Austrian biologist and physician. He is best know for distinguishing the main blood groups in 1900. He identified the presence of agglutinins in the blood and classified the blood groups.

Early life

Landsteiner was born on June 14, 1868. Landsteiner’s father Leopold, known Viennese journalist, died at age 56, when Karl was only 6. His mother Fanny raised him on her own which led to a close relationship between him and his mother.


Karl Landsteiner graduated with the Matura exam from a Vienna secondary school. Afterwards he earned a medical degree from the University of Vienna In 1891. From 1898 to 1908, he became an assistant in the University Department of Pathological Anatomy in Vienna. Wh