Cryptologic Bytes

"On This Date in History" Calendar

2010: Peter Calvocoressi died.

Sunday, February 5, 2023

Peter John Ambrose Calvocoressi, born 17 November 1912, was a British lawyer, historian, author, and publisher. He served as an intelligence officer at Bletchley Park during World War II. He worked in 'Hut 3', where decrypted Enigma messages were translated and analysed, and Ultra intelligence was prepared for dispatch to commanders in the field. Calvocoressi rose to be head of the Air Section, which dealt with Luftwaffe intelligence. In summer 1945, he was accredited by British Intelligence to obtain evidence for all four Chief Prosecutors at the International Military Tribunal at Nuremberg. As a member of the British prosecution team, he cross-examined former German Field Marshal Gerd von Rundstedt during the trial. Calvocoressi later advised the US Chief Prosecutor (General Telford Taylor), who had been his Bletchley colleague, in some of the American follow-up trials (1946–1949). He died on 5 February 2010.


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