The Simon Wiesenthal Center’s European office joined the Russian Holocaust Center of Moscow and Verbe et Lumiere on Monday in criticizing authorities for “revisionist history” in the case of the Holocaust-era mass killings at Babi Yar in Ukraine.

Last year, authorities replaced a plaque identifying most of the tens of thousands of victims of the murders as Jews with one that replaces all such references with an epitaph to “the peaceful citizens of Rostov-on-the-Don and Soviet prisoners of war.”

Shimon Samuels, the Wiesenthal Center’s director of international relations, said at a conference that the change of the plaque was “memoricide,” adding that it “twice murders the victim, in both life and in posterity.”