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
Law of Lithuania 2004. The civil law and commercial law is codified in a single legal act - the Civil Code of the Republic of Lithuania () which is in force since 1 July 2001. It is influenced by the civil codes of Quebec and the Netherlands. The commercial law in Lithuania is of an increasingly excellent drafting quality and the market in Lithuanian legal services is now increasingly competitive. Legal professionals are prepared and the law is researched in departments of three universities of Lithuania: Law of Lithuania Lithuanian law is a part of the legal system of Lithuania. It belongs to