The Duke and Duchess of Cambridge, Prince George and Princess Charlotte arrive in Warsaw for #RoyalTourPoland????
William and Kate are scheduled to spend two days in Poland touring the country's historical sites, including the Stutthof Concentration Camp, where more than 65,000 people perished during World War II, and the shipyards in Gdansk, the birthplace of Poland's Solidarity movement.
In Germany, William and Kate are planning to meet with German Chancellor Angela Merkel, visit Berlin's Brandenburg Gate, enjoy a traditional beer garden in Heidelberg and pay a somber visit to Berlin's Holocaust Memorial.
In March, the Duke and Duchess of Cambridge spent two days in Paris, on their first official visit there as a couple to solidify the relationship between France and the U.K.
On Saturday, William and Harry participated in a charity polo match to raise funds for several of their charities.