LUXEMBOURG - MAY 11: Catherine, Duchess of Cambridge with Duchess Stephanie of Luxembourg visits the Drai Eechelen Museum on May 11, 2017 in Luxembourg. The Duchess will attend a series of engagements to celebrate the cultural and historic ties between the UK and Luxembourg and the official commemoration of the 1867 Treaty of London, which confirmed Luxembourg's independence and neutrality. (Photo by Tim Rooke - Pool/Getty Images)
