sentences:  Most Finnish archives, including practically all material from the Middle ages, was destroyed in the fire.At the time of the fire, and for some time afterwards, Turku was the largest city in Finland, which is why the Great Fire of Turku was a major national disaster.As a result of the fire, the Imperial Academy of Turku was transferred to Helsinki, the new capital of the Grand Duchy of Finland, thus contributing to the city losing its significance as Helsinki grew.