In this region, I relied heavily on a single source from which I drew my list of places to include in the database as well as the countries and subdivisions in which they were located. The source, Erläuterungen zum Geschichtlicher Atlas der Rheinprovinz, is meant to accompany a map showing, as of 1789, the internal and external boundaries of the territory that became that Prussian province after the Napoleonic Wars. The text includes descriptions of boundary changes beginning in 1600 (of which there were remarkably few, making the need for many additional sources unnecessary). The map itself also has an insert covering the period between 1803 and 1806. The text and map can be found at the following links:
- Erläuterungen zum Geschichtlicher Atlas der Rheinprovinz – Google Books (text)
- Fabricius-Übersichtskarte_der_Rheinprovinz_von_1789.jpg (3618×5599) (wikimedia.org) (map)
Outside of that source, Aachen-based researcher Peter Packbier provides a lot of useful information on the Duchy of Jülich. It can best be accessed from page 7 of aemterjuelich.pdf, which contains links to information on each Amt.
Information on the smaller lordships is harder to find. Articles in the German Wikipedia filled in most of the gaps. Other useful sources with regard to the Jülich share of Gimmigen and Kirchdaun were as follows:
- The end of Schleiden administration and the beginning of Landskron administration are documented in the last few paragraphs of KirchdaunLuftbildaufnahme aus dem Archiv des Kreises AhrweilerFreigegeben unter Nr
- The end of Landskron administration can be inferred from the death date of Johann von Brempt, documented here: gw.geneanet.org/frebault?lang=en&n=von+brempt&oc=2&p=johann