This collection of studies examines different aspects of Romanian diplomacy in the 20th century, thus highlighting the activity of various diplomats, seeking to explain the changes produced within the Ministry of Foreign Affairs following political transformations in Romania, and aiming to analyse different topic and "dossiers" related to foreign policy, as well as the negotiated perspectives of career diplomats, ministers of foreign affairs, and politicians regarding the directions of foreign policy or the "dossiers" of national interest and security.