The achief provides a complete picture of Onno Greiner's life and work. It contains a small amount of personalia, a series of general correspondence and a large amount of documents concerning public appearances and participations and memberships. The files accompanying the designs/works are complete and contain both drawings and written documents concerning the various phases of the work. Documents concerning execution, such as working drawings and correspondence with contractors and suppliers, have been preserved only for the most important works.
There is photographic documentation of many of the works. In some cases these can be found in collection albums, which are described in the Photos section. Photo material in these albums is referred to from the description of the work files.