Poland: timeline and key events

Baptism of Poland

On April 14, 966, Prince Mieszko I is baptized in the Catholic rite, integrating Poland into the community of Christian nations of Europe and thus founding the historical Polish state.

Battle of Grunwald, victory over the Teutonic Order

On July 15, 1410, the Polish-Lithuanian coalition of King Władysław II Jagiełło crushes the Teutonic Order at Grunwald, one of the largest medieval battles in Europe, ending the Teutonic threat.

Copernicus publishes the heliocentric model

Nicolaus Copernicus publishes De revolutionibus orbium coelestium in 1543, proposing that the Earth revolves around the Sun and not the reverse, revolutionizing cosmology and heralding the modern scientific revolution.

Sobieski saves Vienna from Ottoman siege

On September 12, 1683, Polish King Jan III Sobieski leads the largest cavalry charge in history at the Battle of Vienna, breaking the Ottoman siege and saving European Christendom according to tradition.

Constitution of May 3, first in Europe

The Constitution of May 3, 1791 is the first written constitution in Europe and the second in the world after that of the United States, establishing a constitutional monarchy and limiting noble privileges.

Third Partition, disappearance of Poland

On October 24, 1795, Russia, Prussia, and Austria carry out the third and final partition of Poland, erasing the Polish state from the map of Europe for 123 years, until 1918.

Restoration of Polish independence

On November 11, 1918, Józef Piłsudski takes command of the Polish army in Warsaw and proclaims independence, ending 123 years of partition between Russia, Prussia, and Austria.

Miracle on the Vistula, victory over the Red Army

In August 1920, General Piłsudski's Polish army wins the Battle of Warsaw against the Bolshevik Red Army, stopping Soviet expansion toward Western Europe in what is called the Miracle on the Vistula.

Nazi and Soviet invasion of Poland

On September 1, 1939, Nazi Germany invades Poland from the west, triggering World War II. On September 17, the USSR attacks from the east under the Molotov-Ribbentrop Pact, and Poland is divided.

Katyn massacre, 22,000 Polish officers

In spring 1940, the Soviet NKVD executes approximately 22,000 Polish officers, intellectuals, and elites in the Katyn forest and other sites, a crime long attributed to the Nazis and acknowledged by the USSR only in 1990.

Warsaw Uprising crushed by the Nazis

From August 1 to October 2, 1944, the Polish Home Army (AK) rises against the Nazi occupier in Warsaw. The uprising is crushed and Hitler orders the total destruction of the city, killing 200,000 civilians.

Foundation of Solidarity by Lech Wałęsa

In August 1980, strikes at the Gdansk shipyards lead to the creation of the independent trade union Solidarność (Solidarity) under Lech Wałęsa's leadership, the first free trade union in the Soviet bloc.

Semi-free elections, end of communism

The elections of June 4, 1989, the first semi-free elections in Poland since 1939, see Solidarity win a landslide victory, paving the way for the fall of the communist regime and inspiring revolutions across Eastern Europe.

Poland's accession to the European Union

On May 1, 2004, Poland joins the European Union with nine other countries in the EU's largest enlargement. With 38 million inhabitants, it becomes the largest of the new member states and a major European player.