For the visualisations, data sets from the Salomon Ludwig Steinheim-Institut for Jewish-German History and the Academy of Sciences and Literature | Mainz have been used.
Epidat - The Database of Jewish epigraphy - provides the inventory, documentation, editions and presentation of epigraphical collections. Records are released under CC-BY and are available in a wealth of formats (HTML, TEI, etc.).
The CVMA digital image archive contains high quality fotos of medieval stained glass windows studied by the project. The images and metadata are released under CC-BY and are available as TIFF (images), XMP and JSON-LD (metadata).