David Cameron has visited the Auschwitz Nazi death camp in Poland.
The Prime Minister travelled to the notorious site with the chairman of the commission he established to ensure Britain has a "permanent and fitting memorial to the Holocaust".
The trip to Auschwitz, the first by Mr Cameron, was heralded in his speech to the Israeli Knesset in March.
He has expressed his determination that memories of the atrocities are kept "strong and vibrant".
The PM made the visit on the way back from Turkey, where he held talks with President Recep Tayyip Erdogan.
"I want every child in Britain to learn about the Holocaust and to understand just how vital it is to fight discrimination and prejudice in our world," he said.
"It is vital that we do all we can with our international partners to preserve the site at Auschwitz."
Karen Pollock, chief executive of the Holocaust Educational Trust, said Auschwitz was the site of the "most heinous crime in our shared history".
She said the PM would have seen the train tracks that brought huge numbers of Jews from across Europe, the crude stables in which they were kept and the gas chambers in which they were murdered.
"Over the last 15 years, with the support of Government funds, we have taken 25,000 students and teachers to visit Auschwitz-Birkenau. They come back describing it as life-changing. The Prime Minister ... too will benefit from that unique experience."
The commission is chaired by Mick Davis of the Jewish Leadership Council and includes senior politicians alongside a range of notable figures such as actress Helena Bonham Carter and Chief Rabbi Ephraim Mirvis.