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Here you may find a scientific paper by  Dr. Klaus Hardering about the establishment of ZDV.  Dr. Hardering is head manager of the Cathedral-building archives.
The treatise was published in

HISTORISM AND CULTURAL IDENTITY IN THE RHINE-MEUSE REGION
Tensions between Nationalism and Regionalism in the Nineteenth Century
Editors: Wolfgang Cortjaens; Jan De Maeyer; Tom Verschaffel
Distributed by : Leuven University Press
Available since: SEPTEMBER 2008
ISBN: 978-90-5867-666-5

The whole story