Britain's Prince William (L), Duke of Cambridge, and his wife Kate, the Duchess of Cambridge, form dough into pretzels as they visit the market in the historic center of Southern German town of Heidelbergon July 20, 2017.
The British royal couple is on a three-day visit in Germany. / AFP PHOTO / POOL / THOMAS KIENZLE        (Photo credit should read THOMAS KIENZLE/AFP/Getty Images)