The photographs of Baroque ceiling and wall painting in its architectural context, which were taken as part of the Corpus of Baroque Ceiling Painting in Germany (CbDD), are integrated and displayed on the publication platform of the CbDD on the one hand, but also on the image portal Bildindex der Kunst und Architektur of the Deutsches Dokumentationszentrum für Kunstgeschichte – Bildarchiv Foto Marburg (DDK). In addition to the three thousand new images published to date (April 2020), which have been produced for the CbDD since 2015, there are numerous historical images, such as colour photographs from the 1930s and 1940s and older black-and-white images, which have been published as deeply indexed datasets in four and a half thousand works and work sections (April 2020), documenting past conditions and representing an important source of material for science today. The Bildindex contains in total more than 1.8 million works and work sections (April 2020), which have been recorded with metadata on the basis of scientific findings and can be searched under specific questions. With the integration of the Gemeinsamen Normdatei (GND) of the Deutsche Nationalbibliothek, the Bildindex also offers networked access to further information resources.
In the 1970s, the Deutsches Dokumentationszentrum für Kunstgeschichte - Bildarchiv Foto Marburg (DDK) began publishing its photographic collection in the most modern contemporary medium, the microfiche. Since 1999 the publication has been digitally and freely accessible in the Bildindex der Kunst und Architektur. With the Bildindex, the DDK operates a composite database, generated by the resources of currently eighty-one cultural and scientific institutions, such as archives, libraries, offices for historical monuments, museums as well as university and research institutes, which primarily allows the public to experience the visual cultural heritage through metadata and high-resolution image material. Standardisation processes for data models, catalogues for fields, terminologies and standard data connection in the sense of the Semantic Web were consolidated with the Arbeitsgemeinschaft der kunsthistorischen Bildarchive und Fototheken (AKBF) and receive additional impetus through the co-development of the standard harvesting format LIDO (Lightweight Information Describing Objects) in the Fachgruppe Dokumentation im Deutschen Museumsbund. There are international cooperations in this field with the Getty Research Institute (USA) and the Collections Trust (GB) as well as in projects in the context of the Europeana.