The Union of Lublin was signed on 1 July 1569 in Lublin, Poland, and created a single state, the Polish–Lithuanian Commonwealth, one of the largest countries in Europe at the time. It replaced the personal union of the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania with a real union and an elective monarchy, as Sigismund II Augustus, the last of the Jagiellons, remained childless after three marriages. In addition, the autonomy of Royal Prussia was largely abandoned. The Duchy of Livonia, tied to Lithuania in real union since the Union of Grodno (1566), became a Polish–Lithuanian condominium.
Act of the Union of Lublin from 1569
The Polish-Lithuanian Commonwealth in 1569
Painting commemorating Polish–Lithuanian union circa 1861; The motto reads "Eternal union."
Lithuanian is an East Baltic language belonging to the Baltic branch of the Indo-European language family. It is the language of Lithuanians and the official language of Lithuania as well as one of the official languages of the European Union. There are approximately 2.8 million native Lithuanian speakers in Lithuania and about 1 million speakers elsewhere. Around half a million inhabitants of Lithuania of non-Lithuanian background speak Lithuanian daily as a second language.
The oldest surviving manuscript in Lithuanian (c. 1503), rewritten from a 15th century original text.
Ethnolinguistic area of Lithuanians and the Lithuanian language in 1917 by Prussian Lithuanian professor Vilius Gaigalaitis (Wilhelm Gaigalat), the dashed areas represent linguistically mixed border areas where Lithuanians formed a large minority
Title page of Vyriausybės Žinios with articles of the 1922 Constitution of Lithuania. The sixth article established Lithuanian as the sole official language of Lithuania.
Linguistic areal of the Lithuanian language in Russia and German Prussia by Ethnographer Franz Oskar Tetzner in 1902
