Link to Wikipedia article: https://en.wikipedia.org/wiki/Berlin
Link to Citizenship records and history of Berlin: https://dev.stadtbuecher.de/en/stadtbuecher/deutschland/berlin/berlin/
https://dev.stadtbuecher.de/en/archive/landesarchiv-berlin/
History of Berlin: https://anderes-berlin.de/die-erste-garnisonkirche-die-grosse-pulverturmexplosion/
Good chapters on Brandenburg in https://webfiles.ucpress.edu/oa/9780520972797_WEB.pdf/ Public Goods Provision in the Early Modern Economy Comparative Perspectives from Japan, China, and Europe Edited by Masayuki Tanimoto & R. Bin Wong
Open access books; https://blha.brandenburg.de/blha/de/suchen-finden/fachpublikationen/studien-zur-brandenburgischen-und-vergleichenden-landesgeschichte/