The memorial at the Auschwitz Concentration Camp has criticised a TD for comparing the vaccination programme to Nazi Germany.
Independent TD Mattie McGrath said Government decisions on indoor dining was "exactly the same" as Germany in the 1930s.
On Twitter the Auschwitz Memorial account said the comments were a "sad symptom of moral and intellectual decline" and sent Deputy McGrath a free online course about the holocaust.
Speaking outside the Dáil earlier, Mattie McGrath defended comparing the vaccination programme to Nazi Germany