Block H, the world's first purpose-built computer centre

The world's first purpose-built computer centre that housed most of the Colossus computers is now home to the rebuild of Colossus which now occupies the original position of Colossus No 9.

The working Colossus Rebuild can be seen daily at The National Museum of Computing. It is a lasting tribute to the men and women whose code-breaking work at Bletchley Park, Buckinghamshire, UK made such a huge impact on the outcome of World War II.