ERFURT, GERMANY - FEBRUARY 08: King Willem-Alexander (R) and Queen Maxima (C) of the Netherlands visit the exhibition in the old synagogue on February 8, 2017 in Erfurt, Germany, beside stands Andreas Bausewein (L), mayor of Erfurt. The royal couple will pay a working visiting from February 7 to 10 to the German Bundeslaender Thuringia, Saxony and Saxony-Anhalt in order to deepen trade and investment relations and promote cooperation in high-tech systems, chemicals and flood protection sectors. (Photo by Jens Schlueter/Getty Images)