Simon Wiesenthal (1908-2005) was an Austrian Holocaust survivor, Nazi hunter, architect, writer, and advocate renowned for his lifelong dedication to tracking down and bringing Nazi war criminals to justice after World War II. Born in Buczacz (then part of Austria-Hungary, now Ukraine), he studied architecture and earned a degree in architectural engineering from the Technical University of Prague in 1932. At the outbreak of World War II, he was living in Lwów (now Lviv, Ukraine), where he worked in an architectural office after marrying Cyla Muller in 1936. Wiesenthal survived multiple Nazi concentration camps, including Janowska, Kraków-Płaszów, Gross-Rosen, a death march to Chemnitz, Buchenwald, and Mauthausen, from which he was liberated in 1945. After the war, he founded the Jewish Documentation Centre in Vienna in 1961, serving as its head until 2003, where he documented Nazi crimes and assisted in prosecutions, most notably aiding in the capture of Adolf Eichmann. He received numerous death threats from neo-Nazis, including a bomb explosion outside his Vienna home on June 11, 1982, leading to permanent police protection. His wife Cyla suffered from depression due to the stresses of his work and related legal battles. Wiesenthal authored autobiographies and was a tireless advocate against indifference to Nazi atrocities, contributing significantly to post-WWII justice efforts. He is also noted as the founder of the Simon Wiesenthal Center.