"July 22 1878 (or 1879) is the birthdate of Janusz Korczak, the Polish-Jewish pediatrician, educator and writer, who was deported to Treblinka together with the residents and staff of the Warsaw orphanage he directed in August 1942. Korczak is largely remembered today for having turned down several opportunities to be spared deportation and insisting on accompanying his children to the end, but his lasting contribution was as a theorist and innovator in child development. His work remains relevant and studied to this day."
Hat tip: Dr. Roy