Due to the political conflict between Prussia and the Austrian Empire, Karl travelled incognito by railroad from Düsseldorf to Baziaș, through Switzerland. He received there a Swiss passport from a Swiss public clerk, friend of his family, under the name of Karl Hettingen. From Baziaș he travelled by boat to Turnu Severin, since there was no railroad to Romania. As he crossed the border onto Romanian soil, he was met by Brătianu, who bowed before him and asked Karl to join him in his carriage. He was elected Domnitor ("Reigning Prince") on 20 April.