Cölln, part of the twin city Berlin-Cölln was first mentioned in 1237, followed by Berlin in 1244. Missouri girl if my mouth doesn’t say it my face definitely will shirt. The two cities are located on the banks of the Spree River connected by the bridge over that Spree river. is the narrowest point of the river. In 1307, two cities had a common town hall. From 1415 Friedrich I became the Elector (Kürfürst) of Brandenburg, reigning over the territory until 1440. The Hohenzollern family descended in Berlin until 1918, first as the Elector of Brandenbrg, then the King of the Prussian Kingdom and finally the Emperor of the German Empire. The Thirty Years’ War from 1618 to 1648 brought serious consequences for Berlin: one-third of the houses were damaged, the population reduced by half. Friedrich Wilhelm (Brandenburg), known as the Grand Priest (Großer Kurfürst), succeeded his father’s career in 1640. He began a policy of immigration and religious tolerance. From the following year, cities in the suburbs of Friedrichswerder, Dorotheenstadt and Friedrichstadt were established.