HAMBURG, Germany (AP) — Britain's Prince William and his wife, Kate, wrapped up a three-day trip to Germany in Hamburg, where they attended a concert for children in a spectacular new concert hall on Friday.

The couple, known as the Duke and Duchess of Cambridge, kicked off their two-nation European tour in Poland earlier this week before visiting Berlin and Heidelberg. They traveled with Prince George and Princess Charlotte, though the children didn't appear at most of their public engagements.

On Friday, they took a train from Berlin to Hamburg and visited the city's International Maritime Museum, where they were shown a new model of Britain's royal yacht Britannia.

The royals viewed Hamburg's harbor from the new Elbphilharmonie concert hall, and joined 350 schoolchildren to hear a concert with excerpts from Beethoven's Fifth Symphony.

They then visited European plane maker Airbus' Hamburg plant, where they met apprentices and were being shown the assembly of A320 jets, as well as two helicopters.