From 1859 to 1864, he was Envoy to the Kingdom of Denmark and took part in the negotiation of the 1864 Treaty of Vienna that concluded the Second Schleswig War.
Od 1859. do 1864., bio je izaslanik u Kraljevini Danskoj, a sudjelovao je u bečkim mirovnom pregovorima 1864., koji su uključivali drugi schleswički rat.