The first large burning came on 6 May 1933. The German Student Union made an organised attack on Magnus Hirschfeld's Institut für Sexualwissenschaft (roughly: Institute of Sex Research). Its library and archives of around 20,000 books and journals were publicly hauled out and burned in the street. Its collection included unique works on intersexuality, homosexuality and transgender topics. 1/2
It's believed that Dora Richter, the first transgender woman known to have undergone sex reassignment surgery (by doctors at the institute), may have been killed during the attack. 2/2