Online retail giant Amazon.com has come under fire from a German politician for selling a jigzaw puzzle that depicts the ovens in the crematorium of a Nazi death camp.

Conservative politician Gerda Hasselfeldt wrote in a letter to Amazon that the 252-piece Dachau puzzle was “a real slap in the face for concentration camp survivors and relatives of victims,” according to Der Spiegel.

The puzzle, being sold for $24.99, shows two ovens at one of the camp’s two crematoriums, where the bodies of prisoners were burned.

“It cannot be in Amazon’s interest to sell such a game,” wrote Hasselfeldt, who is the parliamentary chief of the Christian Social Union of Bavaria.

Dachau, opened in 1933, was the first Nazi concentration camp in Germany. It is located some 10 miles northwest of Munich in the state of Bavaria. Estimates place the number of prisoners killed there at 200,000, of which approximately one third were Jews.