The Polish–Lithuanian union was a relationship created by a series of acts and alliances between the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania that lasted for prolonged periods of time from 1385 and led to the creation of the Polish–Lithuanian Commonwealth, or the "Republic of the Two Nations", in 1569 and eventually to the creation of a unitary state in 1791.[1]
1432 (1432–34) – Union of Grodno, a declarative attempt to renew a closer union
1499 – Union of Kraków and Vilnius in which the personal union became a dynastic union and recognised the sovereignty of Lithuania and described relations between the two states