The Bletchley Park Museum occupies an English country house and estate in Bletchley, Milton Keynes (Buckinghamshire), and celebrates Bletchley Park the principal centre of Allied code-breaking during the Second World War. . Bletchley Park housed the Government Code and Cypher School (GC&CS), which regularly penetrated the secret communications of the Axis Powers – most importantly the German Enigma Lorenz cipher. The team of codebreakers included the computer pioneer Alan Turing and the "Ultra" intelligence produced at Bletchley was believed to have shortened the war by two to four years.
https://en.wikipedia.org/wiki/Bletchley_Park_museum