Sophia was interested in politics and engaged herself in state affairs during her life, and was occasionally present as an observer during the parliamentary sessions. In 1866 her birth country, the Duchy of Nassau, was annexed by Prussia. After this, she kept an anti-Prussian view. In the summer of 1870, she was present in Ems where she met both the Tsar of Russia and the King of Prussia shortly before the declaration of the war, and kept herself informed about the political situation. She did not oppose the united Empire of Germany as such, but disliked how it had been created and the dominance of Prussia. She did, however, have a good personal relationship with Crown Prince Frederick of Prussia and his consort. Upon the death of her brother-in-law on 18 September 1872, Sophia became queen consort of Sweden and Norway. At that time, there was a tense political situation and demands for a republic. Oscar was initially not popular, but there were hopes that he would let himself be guided by the advice of Sophia, who was considered politically insightful. Also in Norway, there were hopes that Sophia would use her influence on Oscar to introduce a more equal place in the union. Sophia was crowned with Oscar in Stockholm in Sweden 12 May and in Trondhjem (now Trondheim) in Norway 18 June 1873. In Norway, the couple made a tour around the country in connection to the coronation which has been described as a triumph. In 1875, the king and queen made a tour in Europe. They first visited Denmark and after this Berlin and then Dresden. The visit to King Albert of Saxony and his Queen, Carola of Vasa in Dresden was considered significant, as this meant a symbolic peace between the Bernadotte dynasty and the deposed Vasa dynasty, as Queen Carola was the grand daughter of the deposed king Gustav IV Adolf and let it be known that the past was forgotten. After Dresden, Sophia interrupted the tour for health reasons while Oscar continued to Weimar and Russia. Another important event was the uncovering of the statue of Charles XIV John in Oslo on 7 September 1875, which was celebrated with great festivities with invited foreign royalty and military parades and considered a memorable propaganda occasion. Another important event as Queen of Norway was the stay at Moss in 1877 with the former Crown Prince Napoleon of France. During the autumns, the royal couples normally stayed at Drottningholm Palace, where they received foreign royal dignitaries and hosted ceremonial parties.