06-08-2012, 05:08 PM
I got an answer from our county's archive director Dr Claudia Arndt today.
She writes that there is one copy of the find book "Archive of the Benedictines, Siegburg" in the archive of the Rhine-Sieg county, wherein also some files concerning the "reserve hospital Siegburg (1940-1945)" are listed. You can look at the find book in the archive's reading room from monday to thursday 0830 to 1230 and 1330 to 1600. The files themselves are in the archbishopric historical archive of Cologne and would have to be looked in there.
Christoph