The prosecutor who subpoenaed and cross-examined Hitler in 1931 for a murder trial against four brownshirts was a Jewish lawyer named Hans Litten. The three-hour testimony left Hitler so unnerved and humiliated that he forbade anyone speak Litten’s name in his presence, and he was killed in a concentration camp. Today, the German bar association is called the Hans Litten Association, and every year they give out the Hans Litten Award for excellence in the legal profession. That’s how you commemorate history.