 Complete the following phrase:  After a quiet period during the First World War, a new spa centre designed by architect Paul Wigreux was opened in 1926. In the 1930s, the hotels were occupied not by visitors interested in the waters but by émigrés from Nazi Germany. At the same time it was visited by Polish pianist Arthur Rubinstein. During the Second World War, well-to-do Nazis enjoyed relaxing at Staatsbad-Mondorf, far away from the bombing and fighting. In 1945, Mondorfs Palace Hotel became Camp Ashcan, a prisoner-of-war camp for senior Nazi dignitaries who awaited 