On this day in 1944.

Anne Frank/Family Arrested in Amsterdam

On this day in 1944, Anne Frank and her family were arrested in Amsterdam by the Nazis, thanks to a tip from a Dutch informer.  Although Amsterdam has historically been known as a liberal haven, a greater percentage of Jews from The Netherlands were killed by the Nazis than from any other Western European country, including Poland.

Wikipedia
This Day in History Article
Jerusalem Center for Public Affairs