History of Lithuania (1219–95) the first capital of Lithuania. The attack failed and Tautvilas' forces retreated to defend themselves in Tverai Castle, in the present-day Rietavas municipality. Vykintas died in or about 1253, and Tautvilas was forced to rejoin Daniel of Galicia. Daniel reconciled with Mindaugas in 1254; the Black Ruthenian lands were transferred to Roman, the son of Daniel. Vaišvilkas, the son of Mindaugas, decided to join a monastery. Tautvilas recognized Mindaugas' superiority and received Polatsk as a fiefdom. As promised, Mindaugas and his wife Morta were crowned at some time during the summer of 1253, and the Kingdom of Lithuania, proclaimed by
Act of Independence of Lithuania the first Cabinet of Lithuania was formed, and the Council of Lithuania gained control over the territory of Lithuania. Independent Lithuania, although it would soon be battling the Wars of Independence, became a reality. The laconic Act is the legal basis for the existence of modern Lithuania, both during the interwar period and since 1990. The Act formulated the basic constitutional principles that were and still are followed by all Constitutions of Lithuania. The Act itself was a key element in the foundation of Lithuania's re-establishment of independence in 1990. Lithuania, breaking away from the Soviet Union, stressed that it