Events from the year 1921 in Romania. The year saw the formation of the Romanian Communist Party out of the Socialist Party and subsequent imprisonment of the Communist leadership.
3 March – The Convention of Romanian–Polish Defensive Alliance is signed in Bucharest, which came into force on 25 July, cementing the Polish–Romanian alliance.[5]
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^Giurescu, Constantin C.; Matei, Horia C.; Popa, Marcel; Alexandrescu, Ion; Chiper, Ioan (1974). Chronological History of Romania. Bucharest: Enciclopedică Română. p. 462. OCLC251025169.
^Gagelmann, Hartmut (1998). Nicolae Bretan, seine Lieder, seine Opern, sein Leben [Nicolae Bretan, his songs, his operas, his life] (in German). Klausenburg: Tipoholding Verlag. p. 86. OCLC57693941.
^Deletant, Dennis (2006). Romania Under Communist Rule. Bucharest: Civic Academy Foundation. p. 11. ISBN978-9-73821-433-0.
^Cioroianu, Adrian (2007). Pe Umerii lui Marx: O Introducere in Istoria Comunismului Romanesc [On Marx's Shoulders: An Introduction to the History of Romanian Communism] (in Romanian). Bucharest: Curtea Veche. ISBN978-9-73669-390-8.
^Radu, Sorin; Maner, Hans-Christian (2012). Parliamentarism and Political Structures in East-Central and Southeastern Europe in the Interwar Period. Sibiu: "Lucian Blaga" University of Sibiu Publishing House. p. 196. OCLC86489077.
^Moisil, Constantin (1928). "Medalistul C. Kristescu" [Medalist C. Kristescu]. Cronica Numismatică şi Arheologică, Bucharest. VIII (83): 26.
^Cummings, David (2002). International Who's Who in Classical Music. London: Routledge. p. 77. ISBN978-1-85743-160-5.
^Sasu, Aurel (1999). Enciclopedia Marilor Personalități: M-Z [Encyclopedia of Great Personalities: M-Z] (in Romanian). Bucharest: Editura Geneze. p. 422. ISBN978-9-73697-760-2.