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The flag of North-Rhine Westphalia is the flag of the German state of North-Rhine Westphalia.
After the establishment of North-Rhine Westphalia in 1946, this flag had been in use since 1948 although it was not formally established until 1953. The plain tricolour is the state's civil flag. Government authorities use the state flag (Landesdienstflagge), where the flag is defaced by thestate coat of arms.
The flag is a combination of the two former provinces of Prussia that comprise most of the state: the Rhine Province and Westphalia, which unfortunately can easily be confused with the much older Flag of Hungary and with the plain version (not currently used) of the flag of Iran.