Temporary capital of Lithuania during the invasion of Poland, to Lithuania according to the Soviet–Lithuanian Mutual Assistance Treaty. Since then Vilnius has been the capital of the Lithuanian SSR and then independent Lithuania. Lithuania refused to have diplomatic relations between Poland and Lithuania until the ultimatum of 1938. Railroad traffic, telegraph lines or even mail could not cross the Polish–Lithuanian border. Lithuania continued to declare Vilnius as its capital in all official documents, including the constitution. Since the city was controlled by Poland, all Lithuanian authorities were transferred to the city of Kaunas, which became the seat of the government. To reconcile reality with
Russians in Lithuania Russians in Lithuania Russians in Lithuania numbered 140,000 people, according to the Lithuanian estimates of 2015, or 4.8% of the total population of Lithuania. First early settlements of Ruthenians in what is now Lithuania date back to late medieval ages when the first proto-Russian merchants and craftsmen began to permanently reside in several Lithuanian towns. In the late 17th century they were joined by many Russian Old Believers who settled in eastern Lithuania, escaping religious persecution in Russia. The second, larger, influx of Russians followed the annexation of Lithuania by the Russian Empire during the Partitions of Poland in the