The Duchess stepped out in the design as she and Prince William made their way to the Stutthof camp in northern Poland, a former Nazi concentration camp.
Wearing the ‘Imari’ skirt and top from Erdem’s spring/summer 17 collection, the Duchess looked effortlessly chic as she paired the outfit with a tan-coloured clutch and matching strappy heels.
The London-based label is known for its flowing gowns, understated florals and feminine aesthetic.
The British designer announced last week a collaboration with high street retailer H&M - due to launch on 2 November 2017.
It’s the second time in a matter of days the Duchess has picked a floral outfit, opting for a Catherine Walker flowery dress for the Wimbledon final.
The Duke and Duchess are on a five-day tour of Germany and Poland.