Relief sculptures and commemorative plaques to the memory of Janusz Korczak and the Jewish children who perished in the Holocaust. These reliefs by the sculptor Nathan Rapaport are displayed on the wall of Park Avenue synagogue at 87 E Str. in New York.
However, I could not see any plaques mentioning Janusz Korczak.
I know Rabbi Judah Nadich speach:
That is the greater significance of what we as a congregation are doing in constructing a new Hebrew school building. We are dedicating it to the million Jewish children murdered by the Nazis, and the sculptures that will be affixed to the façade of the new building will portray Dr. Janusz Korczak and his children.