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
History of Jerusalem during the Kingdom of Jerusalem History of Jerusalem during the Kingdom of Jerusalem Jerusalem was conquered by the Christian First Crusade in 1099, after it had been under Muslim rule for 450 years. It became the capital of the Christian Latin Kingdom of Jerusalem, until it was again conquered by the Ayyubids in 1187. For the next forty years, a series of Christian campaigns (the Third, Fourth and Fifth Crusades) attempted in vain to retake the city, until Frederick II, Holy Roman Emperor leading the Sixth Crusade successfully negotiated its return in 1229. In 1244, the city was taken by the Khwarazmian dynasty and mostly