Per Johan Valentin Anger was a Swedish diplomat. Anger was Raoul Wallenberg's co-worker at the Swedish legation in Budapest during World War II when many Jews were saved because they were supplied with Swedish passports. After the war, he spent a lot of time trying to clarify Wallenberg's fate.

Raoul Gustaf Wallenberg was a Swedish architect, businessman, diplomat, and humanitarian. He saved thousands of Jews in German-occupied Hungary during the Holocaust from German Nazis and Hungarian fascists during the later stages of World War II. While serving as Sweden's special envoy in Budapest between July and December 1944, Wallenberg issued protective passports and sheltered Jews in buildings which he declared as Swedish territory.