Database for Stadtbücher in Germany: https://www.geschichte.uni-halle.de/mitarbeiter/speer/speer/#anchor2996813
According to Konrad Beyerle's still generally valid description, town books are "written records of municipal authorities since the Middle Ages, organized in book form. They stand in contrast to the loose file management of modern times and the individual document." (K. BEYERLE, Die deutschen Stadtbücher, in: Deutsche Geschichtsblätter 11 (1910), pp. 145-200, here p. 146). The scholarly interest in this source genre is great, as the town registers reflect the urban life of the late Middle Ages like no other source. They represent a veritable treasure trove for all historical disciplines, including constitutional, economic, cultural and socio-historical issues, and are also used extensively by linguists and literary scholars, onomastics and genealogists. The high level of interest is offset by the low level of indexing of the source material, measured against the large number of surviving volumes. Although since the second half of the 19th century there have been repeated edition projects with a regional focus in northern and south-western Germany, and at the same time also in Poland and the Czech Republic, there has been no edition work strategically oriented towards a region or a specific type of town book. Fortunately, the recording of town books has been promoted for years. The long-term project "Index Librorum Civitatum", which is based at the Martin Luther University Halle-Wittenberg and funded by the German Research Foundation (Deutsche Forschungsgemeinschaft), comprehensively records the town book collections with all relevant archival records, finding aids, literature and editions (www.stadtbuecher.de). The city registers of the historical countries and provinces of Silesia, Brandenburg and Pomerania, which today belong to Poland, will also be included in the database by the end of the project in 2028.
Source: Neues Archiv für sächsische Geschichte 91 (2020) .