A shop on Amazon has come under fire for selling Christmas tree ornaments and other products featuring pictures of the Auschwitz concentration camp .

In a post on Twitter, the Auschwitz-Birkenau memorial museum flagged at least four items being sold on Amazon with pictures of the camp on them — including ornaments in the shape of a bell and a six-pointed star, as well as bottle openers.

"Auschwitz on a bottle opener is rather disturbing and disrespectful," the museum wrote Sunday. It urged the online retail giant to remove the items.

The shop describes the items as "travel souvenirs," and sells them alongside other ornaments and items decorated with images of cities and monuments from around the world.

Hundreds of Twitter users have voiced outrage over the products, with some also including screenshots of other heart-shaped ornaments and keychains with pictures of the Nazi German death camp currently being sold on Amazon.

Many said they had raised the issue with Amazon customer support.

An Amazon spokesperson told DW in a statement that the items in question had been removed from the site.

"All sellers must follow our selling guidelines and those who do not will be subject to action, including potential removal of their account. The products in question have been removed," Amazon said.

Although the items were removed, the seller's shop remained open.

Amazon faced backlash earlier this year for selling rugs and shoes with images of Hindu gods on them, prompting thousands of social media users in India to call for a boycott of the shopping site.

'Never Again': Memorials of the Holocaust Dachau The Nazi regime opened the first concentration camp in Dauchau, not far from Munich. Just a few weeks after Adolf Hitler came to power it was used by the paramilitary SS "Schutzstaffel" to imprison, torture and kill political opponents to the regime. Dachau also served as a prototype and model for the other Nazi camps that followed.

'Never Again': Memorials of the Holocaust Wannsee House The villa on Berlin's Wannsee lake was pivotal in planning the Holocaust. Fifteen members of the Nazi government and the SS Schutzstaffel met here on January 20, 1942 to plan what became known as the "Final Solution," the deportation and extermination of all Jews in German-occupied territory. In 1992, the villa where the Wannsee Conference was held was turned into a memorial and museum.

'Never Again': Memorials of the Holocaust Bergen-Belsen The Bergen-Belsen concentration camp in Lower Saxony was initially established as a prisoner of war camp before becoming a concentration camp. Prisoners too sick to work were brought here from other concentration camps, so many also died of disease. One of the 50,000 killed here was Anne Frank, a Jewish girl who gained international fame posthumously after her diary was published.

'Never Again': Memorials of the Holocaust Buchenwald Memorial Buchenwald near the Thuringian town of Weimar was one of the largest concentration camps in Germany. From 1937 to April 1945, the National Socialists deported about 270,000 people from all over Europe here and murdered 64,000 of them.

'Never Again': Memorials of the Holocaust Nazi party rally grounds Nuremberg hosted the biggest Nazi party propaganda rallies from 1933 until the start of the Second World War. The annual Nazi party congress as well as rallies with as many as 200,000 participants took place on the 11-km² (4.25 square miles) area. Today, the unfinished Congress Hall building serves as a documentation center and a museum.

'Never Again': Memorials of the Holocaust Memorial to the German Resistance The Bendlerblock building in Berlin was the headquarters of a military resistance group. On July 20, 1944, a group of Wehrmacht officers around Colonel Claus von Stauffenberg carried out an assassination attempt on Adolf Hitler that failed. The leaders of the conspiracy were summarily shot the same night in the courtyard of the Bendlerblock, which is today the German Resistance Memorial Center.

'Never Again': Memorials of the Holocaust Hadamar Euthanasia Center From 1941 people with physical and mental disabilities were killed at a psychiatric hospital in Hadamar in Hesse. Declared "undesirables" by the Nazis, some 15,000 people were murdered here by asphyxiation with carbon monoxide or by being injected with lethal drug overdoses. Across Germany some 70,000 were killed as part of the Nazi euthanasia program. Today Hadamar is a memorial to those victims.

'Never Again': Memorials of the Holocaust Holocaust Memorial Located next to the Brandenburg Gate, Berlin's Memorial to the Murdered Jews of Europe was inaugurated sixty years after the end of World War II on May 10, 2005, and opened to the public two days later. Architect Peter Eisenman created a field with 2,711 concrete slabs. An attached underground "Place of Information" holds the names of all known Jewish Holocaust victims.

'Never Again': Memorials of the Holocaust Memorial to persecuted homosexuals Not too far from the Memorial to the Murdered Jews of Europe, another concrete memorial honors the thousands of homosexuals persecuted by the Nazis between 1933 and 1945. The four-meter high monument, which has a window showing alternately a film of two men or two women kissing, was inaugurated in Berlin's Tiergarten on May 27, 2008.

'Never Again': Memorials of the Holocaust Sinti and Roma Memorial Opposite the Reichstag parliament building in Berlin, a park inaugurated in 2012 serves as a memorial to the 500,000 Sinti and Roma people killed by the Nazi regime. Around a memorial pool the poem "Auschwitz" by Roma poet Santino Spinelli is written in English, Germany and Romani: "gaunt face, dead eyes, cold lips, quiet, a broken heart, out of breath, without words, no tears."

'Never Again': Memorials of the Holocaust 'Stolpersteine' - stumbling blocks as memorials In the 1990s, the artist Gunther Demnig began a project to confront Germany's Nazi past. Brass-covered concrete cubes placed in front of the former houses of Nazi victims, provide details about the people and their date of deportation and death, if known. More than 45,000 "Stolpersteine" have been laid in 18 countries in Europe - it's the world's largest decentralized Holocaust memorial.

'Never Again': Memorials of the Holocaust Brown House in Munich Right next to the "Führerbau" where Adolf Hitler had his office, was the headquarters of the Nazi Party in Germany, in the "Brown House" in Munich. A white cube now occupies its former location. A new "Documentation Center for the History of National Socialism" opened on April 30, 2015, 70 years after the liberation from the Nazi regime, uncovering further dark chapters of history. Author: Max Zander, Ille Simon



Raising awareness online

The Auschwitz Museum regularly uses its social media accounts to raise awareness about the atrocities committed by the Nazis during World War II and to remember the victims of the Holocaust.

Auschwitz-Birkenau was the largest Nazi death camp, where 1.1 million victims, including some 1 million Jewish prisoners, were killed.

The museum has also used social media to point out bad behavior by visitors at the memorial, including visitors who posed for pictures on the train tracks at the camp.

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