Heerdt is one of the older parts of the city of Düsseldorf. Heerdt and its neighbouring quarters Oberkassel, Niederkassel and Lörick on the left side of the river Rhine, opposite to the other districts of Düsseldorf and the central district.
map of Düsseldorf, showing Heerdt (in red) within District 4 (in pink)
Heerdt was mentioned first time in the 11th century. For a long while Heerdt was strongly connected to the neighbouring town of Neuss. At the end of the 19th century the construction of the first permanent bridge between Düsseldorf and Heerdt changed things. Heerdt became industrialised. Until today the structure of Heerdt shows the era of industrialisation, but there are a lot of relics of the old Heerdt, especially the old churches.