Raoul Wallenberg, a Swedish diplomat, saved thousands of Hungarian Jews from the Nazis during World War Two.

Once Soviet troops reached Budapest, Wallenberg reported to Soviet officials on 17 January 1945. But he was never seen in public again. Rumours of his fate have circled ever since: a Soviet government report said he died of a heart attack in prison, while former officials said he was executed, and prisoners claimed to have seen him decades later. There is still a campaign to uncover what happened to him.

Alex Last made this programme in 2015 using archive recordings.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there. For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

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(Photo: Raoul Wallenberg in 1937. Credit: Keystone/Getty Images)

The mystery of Raoul Wallenberg

Witness History