Crown Prince And Crown Princess Of Norway Visit The Frankfurt Book Fair

FRANKFURT AM MAIN, GERMANY - OCTOBER 15: (L-R) The director of the Buchmesse, Juergen Boos, Crown Prince Haakon of Norway, Crown Princess Mette-Marit of Norway and Norways Prime Minister Erna Solberg smell little cans of the 'Invisible Silence' installation of the artist Sissel Tolaas and Erling Kagge in the exhibition of this year's honorary guest Norway during the opening ceremony at the Frankfurt Book Fair (Frankfurter Buchmesse) on October 15, 2019 in Frankfurt am Main, Germany. Visitors can smell things like 'Death of grandmother, soon after'. The 2019 fair, which is among the world's largest book fairs, will be open to the public from October 16-20. (Photo by Thomas Lohnes/Getty Images)