Bucharest proclaimed capital of Romania.

Barbu Catargiu, the Prime Minister of Romania, is assassinated.

In Romania the mountain railway from Anina to Oravita is used for the first time.

The ''Republic of Ploieşti'', a failed Radical-Liberal rising against Domnitor Carol of Romania.

Mihail Kogălniceanu reads, in the Chamber of Deputies, the Declaration of Independence of Romania. This day became the Independence Day of Romania.

Romania declares itself independent from the Ottoman Empire following the Senate adoption of Mihail Kogălniceanu's Declaration of Independence. This act is recognized on March 26, 1881 after the end of the Romanian War of Independence.

Treaty of Berlin: the European powers redraw the map of the Balkans. Serbia, Montenegro and Romania become completely independent of the Ottoman empire.

Second Balkan War: delegates from Bulgaria, Romania, Serbia, Montenegro, and Greece sign the Treaty of Bucharest, ending the war.

Romania declares war against Austria-Hungary, entering World War I as one of the Allied nations.

World War I: Germany declares war on Romania.

World War I: Battle of Mărăşeşti between the Romanian and German armies begins.

Moldova and Bessarabia join Romania.

Transylvania unites with Romania, following the incorporation of Bessarabia (March 27) and Bukovina (November 28).

Romania annexes Transylvania.

World War II: Germany and the Soviet Union sign a non-aggression treaty, the Molotov-Ribbentrop Pact. In a secret addition to the pact, the Baltic states, Finland, Romania, and Poland are divided between the two nations.

Romanian Prime Minister Armand Calinescu is assassinated by ultranationalist members of the Iron Guard.

World War II: under the Molotov-Ribbentrop Pact, the Soviet Union presents an ultimatum to Romania requiring it to cede Bessarabia and the northern part of Bukovina.

Romania cedes Bessarabia (current-day Moldova) to the Soviet Union.

Treaty of Craiova: Romania loses Southern Dobrudja to Bulgaria.

In Romania, the ruling party Iron Guard arrests and executes over 60 of exiled King Carol II of Romania's aides, including former minister Nicolae Iorga.

Romanian governmental forces, allies of Nazi Germany, launch one of the most violent pogroms in Jewish history in the city of Iaşi, (Romania), resulting in the murder of at least 13,266 Jews.

World War II: Great Britain declares war on Finland, Hungary and Romania.

World War II: UK declares war on Bulgaria. Hungary and Romania declare war on the United States. India declares war on Japan.

World War II: Hungary and Romania declare war on the United States.

World War II: United States declares war on Bulgaria, Hungary, and Romania.

World War II: Romania is captured by the Soviet Union.

World War II King Michael of Romania dismisses the pro-Nazi government of General Antonescu, who is arrested. Romania switches sides from the Axis to the Allies.

The Romanian Army liberates Carei, the last Romanian city under Axis Powers occupation.

Communist-dominated government under Petru Groza assumes power in Romania.

King Michael of Romania is forced to abdicate by the Soviet Union-backed Communist government of Romania.

Albania, Austria, Bulgaria, Cambodia, Finland, Hungary, Ireland, Italy, Jordan, Laos, Libya, Nepal, Portugal, Romania, Spain and Sri Lanka join the United Nations.

In Braşov, Romania, workers rebel against the communist regime of Nicolae Ceaușescu.

After a week of bloody demonstrations, Ion Iliescu takes over as president of Romania, ending Nicolae Ceauşescu's Communist dictatorship.

Nicolae Ceauşescu, former communist dictator of Romania and his wife Elena are condemned to death and executed under a wide range of charges.

The first post-Communist presidential and parliamentary elections are held in Romania.

Pope John Paul II travels to Romania becoming the first pope to visit a predominantly Eastern Orthodox country since the Great Schism in 1054.

NATO invites Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia to become members.

Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia join NATO as full members.

Bulgaria and Romania sign accession treaties to join the European Union.

Bulgaria and Romania officially join the European Union. Also, Bulgarian, Romanian, and Irish become official languages of the European Union, joining 20 other official languages.