Polish-Lithuanian Union - AbsoluteAstronomy.com

The term Polish–Lithuanian Union sometimes called as United Kingdom of Poland and Lithuania refers to a series of acts and alliances between the Kingdom of Poland

Kingdom of Poland (1385–1569)

The Kingdom of Poland of the Jagiellons was the Polish state created by the accession of Jogaila , Grand Duke of Lithuania, to the Polish throne in 1386. The Union of Krewo or Krėva Act, united Poland and Lithuania under the rule of a single monarch...

and the Grand Duchy of Lithuania

Grand Duchy of Lithuania

The Grand Duchy of Lithuania was a European state from the 12th /13th century until 1569 and then as a constituent part of Polish-Lithuanian Commonwealth until 1791 when Constitution of May 3, 1791 abolished it in favor of unitary state. It was founded by the Lithuanians, one of the polytheistic...

that lasted for prolonged periods of time and led to the creation of the Polish–Lithuanian Commonwealth—the "Republic of the Two Nations"—in 1569 and eventually to the creation of a short-lived unitary state in 1791.

The most important acts in the process of union were:

1385 – Union of Krewo
Union of Krewo
In a strict sense, the Union of Krewo or Act of Krėva was a set of prenuptial promises made in the Kreva Castle on 14 August 1385 by Jogaila, Grand Duke of Lithuania, in exchange for marriage to the underage reigning Queen Jadwiga of Poland...

— a personal union
Personal union
A personal union is the combination by which two or more different states have the same monarch while their boundaries, their laws and their interests remain distinct. It should not be confused with a federation which is internationally considered a single state...

that brought Grand Duke of Lithuania Jogaila
Jogaila
Jogaila, later 'He is known under a number of names: ; ; . See also: Jogaila : names and titles. was Grand Duke of Lithuania , king consort of Kingdom of Poland , and sole King of Poland . He ruled in Lithuania from 1377, at first with his uncle Kęstutis...

to Polish
Kingdom of Poland (1385–1569)
The Kingdom of Poland of the Jagiellons was the Polish state created by the accession of Jogaila , Grand Duke of Lithuania, to the Polish throne in 1386. The Union of Krewo or Krėva Act, united Poland and Lithuania under the rule of a single monarch...

throne;
1401 – Union of Vilnius and Radom reassured sovereignty of Grand Duchy of Lithuania
Grand Duchy of Lithuania
The Grand Duchy of Lithuania was a European state from the 12th /13th century until 1569 and then as a constituent part of Polish-Lithuanian Commonwealth until 1791 when Constitution of May 3, 1791 abolished it in favor of unitary state. It was founded by the Lithuanians, one of the polytheistic...

;
1413 – Union of Horodło - heraldic union, that granted many szlachta
Szlachta
The szlachta was a legally privileged noble class with origins in the Kingdom of Poland. It gained considerable institutional privileges during the 1333-1370 reign of Casimir the Great. In 1413, following a series of tentative personal unions between the Grand Duchy of Lithuania and the Kingdom of...

rights to Lithuanian nobility;
1432 (1432–34) – Union of Grodno a declarative attempt to renew closer union;
1499 – Union of Kraków and Vilnius personal union
Personal union
A personal union is the combination by which two or more different states have the same monarch while their boundaries, their laws and their interests remain distinct. It should not be confused with a federation which is internationally considered a single state...

turns to dynastic union
Dynastic union
A dynastic union is the combination by which two different states are governed by the same dynasty, while their boundaries, their laws and their interests remain distinct...

, recognises sovereignty of Lithuania and describes interaction between the two states;
1501 – Union of Mielnik
Union of Mielnik
The Act of Mielnik or Union of Mielnik was an attempt to unite the Kingdom of Poland with the Grand Duchy of Lithuania in 1501. It was not ratified by the Lithuanian Seimas or by the Polish Sejm . The Act of Mielnik remained just a political project...

- personal union
Personal union
A personal union is the combination by which two or more different states have the same monarch while their boundaries, their laws and their interests remain distinct. It should not be confused with a federation which is internationally considered a single state...

renewed;
July 1, 1569 – Union of Lublin
Union of Lublin
The Union of Lublin replaced the personal union of the Kingdom of Poland and the Grand Duchy of Lithuania with a real union and an elective monarchy, since Sigismund II Augustus, the last of the Jagiellons, remained childless after three marriages. In addition, the autonomy of Royal Prussia was...

— a real union
Real union
Real union is a union of two or more states, which share some state institutions as in contrast to personal unions; however they are not as unified as states in a political union...

that resulted in creation of the semi-federal
Federation
A federation , also known as a federal state, is a type of sovereign state characterized by a union of partially self-governing states or regions united by a central government...

, semi-confederal
Confederation
A confederation in modern political terms is a permanent union of political units for common action in relation to other units. Usually created by treaty but often later adopting a common constitution, confederations tend to be established for dealing with critical issues such as defense, foreign...

Republic of the Two Nations (Polish–Lithuanian Commonwealth); and
May 3, 1791 – Polish Constitution of May 3, 1791: the Kingdom of Poland
Kingdom of Poland (1385–1569)
The Kingdom of Poland of the Jagiellons was the Polish state created by the accession of Jogaila , Grand Duke of Lithuania, to the Polish throne in 1386. The Union of Krewo or Krėva Act, united Poland and Lithuania under the rule of a single monarch...

and the Grand Duchy of Lithuania
Grand Duchy of Lithuania
The Grand Duchy of Lithuania was a European state from the 12th /13th century until 1569 and then as a constituent part of Polish-Lithuanian Commonwealth until 1791 when Constitution of May 3, 1791 abolished it in favor of unitary state. It was founded by the Lithuanians, one of the polytheistic...

were abolished, and a common state was created in their place. The changes were modified with the Reciprocal Guarantee of Two Nations that stressed the continuity of bi-national status of the state, and were reversed completely in 1792 under pressure of Russian Empire
Russian Empire
The Russian Empire was a state that existed from 1721 until the Russian Revolution of 1917. It was the successor to the Tsardom of Russia and the predecessor of the Soviet Union...

forces.

See also