Establishment of diplomatic relations: 22/2/1919, Information provided by Romania.
The Polish envoy (Aleksander Skrzyński) presented his credentials to the King of Romania (Ferdinand I) in Bucharest: 22/6/1919, Information provided by Poland.
The Romanian envoy (Alexandru Florescu) presented his credentials to the Chief of State (Józef Piłsudski) in Warsaw: 13/8/1919, Information provided by Poland.
The Polish Ministry of Foreign Affairs, in response to the proposal of the Romanian government of: 1945/8/12, notified the Romanian authorities of their consent to establish diplomatic relations: 13/8/1945, Information provided by Poland.
The Romanian ambassador (Ion Raiciu) presented his credentials to the president of the National Council (Bolesław Bierut) in Warsaw: 4/4/1946, Information provided by Poland
The chargé d'affaires of the Polish Embassy (Stefan Wengierow) submitted introductory letters to the Ministry of Foreign Affairs in Bucharest: 8/4/1946, Information provided by Poland.