Roman Rosen

Baron Roman Romanovich Rosen (Russian Роман Романович Розен; * 12 Februarjul / February 24 1847greg in Reval, .. † December 31, 1921 in New York ) was a Baltic German nobility and Imperial Russian diplomat. Rosen served from 1904 to 1911 as a Russian ambassador to the United States of America. Previously, he had worked as a Russian ambassador to Japan and the Kingdom of Bavaria.

In the negotiations on the Treaty of Portsmouth ( 1905) he was a member of the Russian delegation, headed by Sergei J. Witte.

After the October Revolution he fled from home with his family to Sweden and later to the United States of America.