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In page Düsseldorf:

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In 1186, Düsseldorf came under the rule of the Counts of Berg. 14 August 1288 is one of the most important dates in the history of Düsseldorf, the day the sovereign Count Adolf VIII of Berg granted town privileges to the village on the banks of the Düssel. Before this, a bloody struggle for power had taken place between the Archbishop of Cologne and his allies arrayed against the count of Berg and other local powers, culminating in the Battle of Worringen.[citation needed] The Archbishop of Cologne's forces were wiped out by the forces of the count of Berg, who were supported by citizens and farmers of Cologne and Düsseldorf, paving the way for Düsseldorf's elevation to city status, which is commemorated today by a monument on the Burgplatz.