|Heraldry of the World |
Wappen der Welt
Civic heraldry of Germany
The black cross is the arms of the State of Köln to which the town historically belonged. The keys in the first quarter symbolise St. Peter, patron saint of the State of Köln. The bishop in the second quarter is St. Benedict, patron saint of Heerdt.
Literature : Background and image provided by Joachim Beeck