The overall project on the Historical Register of Houses in Dresden (1495 to 1896) by Karl Hollstein is making this key source on Dresden’s urban, social, property and economic history accessible in digital form. The starting point is the extensive collection of index cards compiled by Carl Hollstein between 1906 and 1924, documenting the history of houses and property ownership in the former fortress city of Dresden. Hollstein reconstructed the ownership history of plots of land and houses, working backwards from the mid-19th century to the 16th century. His work was based on archival sources such as building registers, contract books, deeds of sale, assignment registers and older land registers. The result of his work was an exceptionally comprehensive documentation of ownership histories, house numbering systems and topographical classifications, which, however, remained accessible only at the Dresden City Archives for a long time.
The publication and cataloguing project began in 2008 with the digitisation of the 14,929 index cards. The focus was on the area of the Old Town on the left bank of the Elbe within the old fortress walls, which is fully documented in Hollstein’s records. The aim was not merely to preserve the material, but to carry out its systematic scholarly processing: the index cards were transcribed, standardised, converted into structured data records and linked to further sources as well as georeferenced historical maps. Data entry was carried out using a double-keying procedure to ensure the quality of the transcription. Separate records for individuals and buildings were created from the index cards; these were later merged and supplemented with standardised information (see Volume 1: Card Archive and Comprehensive Database of the Dresden House Register 1495 to 1896 (Vol. 1, DOI: 10.22000/ug6rug3tss0jn10a ) .
A key challenge posed by the collection was the variety of historical plot and house numbering systems, which changed several times over the centuries. Hollstein had already carried out an identification process, which was further consolidated by the project. To this end, the Dresden address books from 1839, 1840 and 1860 were digitally analysed and cross-referenced with the 1862 city map drawn up by Friedrich August Lang. In this way, it was possible to unambiguously locate the vast majority of the houses mentioned by Hollstein within the city. Only a very small proportion of the property ownership details have so far remained without a direct spatial assignment. The address books provide additional information on the houses for the year 1860 (see House-based data from the Dresden address books of 1839, 1840 and 1860, as well as the concordance of plot numbers (Vol. 2), DOI: 10.22000/e6ggwpvy15hpzk55) .
Beyond mere digitisation, the project offers significant methodological added value. The data has not only been cleaned and standardised, but also automatically enriched with classifications of historical official and occupational titles. This opens up new possibilities for socio-historical and economic analyses, for example regarding ownership structures, occupational groups, social differentiation, urban change and the spatial structure of the city. In addition, the historical town map has been georeferenced and its parcels digitised, enabling cartographic visualisation in QGIS as well as integration into web-based mapping environments. Both the building model and a data version for displaying property owner information in the SLUB’s Digital Map Forum 2.0 will be published in Volume 3 (Digitised House Register (Parcels) of Dresden’s Old Town on the Left Bank of the Elbe, 1862, Vol. 3, DOI: 10.22000/278zmxuhvm26gm34) .