Kate Middletonis connecting with her family roots with a visit to a World War II code-breaking center on Tuesday.

The royal mom of three, 37, stepped out at Bletchley Park, the secret wartime spy base brought to life in the movieEnigma(starringKate Winslet), and where her paternal grandmother, Valerie Glassborow, and her twin sister, Mary, worked during WWII.

Mark Cuthbert/UK Press via Getty

Catherine, Duchess of Cambridge

Kate Middleton.Mark Cuthbert/UK Press via Getty

Catherine, Duchess of Cambridge

As the 75th anniversary of D-Day nears, Bletchley Park Teleprinter is hosting a special exhibit based on newly declassified material, which shows how the intelligence effort coordinated at the center helped in the success of the D-Day landings at Normandy, France. Using sophisticated codebreaking techniques, workers at Bletchley Park supplied information to the American and British led forces in the weeks leading up to D-Day on 6th June 1944.

Princess Kate was shown around the interactive exhibition and met some of those who have helped restore the historic building of the building.

Catherine, Duchess of Cambridge

Kate Middleton.Tim Rooke/REX/Shutterstock

Catherine Duchess of Cambridge

Catherine Duchess of Cambridge

Catherine, Duchess of Cambridge

Kate’s relatives, the Glassborow twins, served in Bletchley’s Hut 6 as duty officers in the “Cover Management Y” team that identified interception sites and signals that were suitable for monitoring. They would then pass the information on to code breakers.

source: people.com