Selected images of the newly rebuilt Cologne airport, originally published in Moderne Bauformen - Monatshefte für Architektur und Raumkunst [Modern Construction Design - Monthly Magazine For Architecture And Interior Art], volume XXXVI, issue no. 6, June 1937, Julius Hoffmann Verlag, Stuttgart, Germany.
Top: according to the original photo caption, these are "festive" passenger facilities in the main building. The two towers of the Kölner Dom [Cologne cathedral] were visible through the glass doors.
Centre: apron with air traffic control tower, grosse Flugzeughalle [large aircraft hangar], operations building, main building, and observation area. The entire assembly stretched across a distance of 400 m.
Bottom: enlargement of bottom left portion of the same image reveals Junkers Ju 52/3m D-ANEN, Werknummer 5072, Fritz Puetter, operated by Deutsche Lufthansa. Aircraft features aerodynamic fairings around its landing gear. (Additional aircraft identity confirmation courtesy of the LEMB Stammkennzeichen Database Project)