The Concordski is located at the Technik Museum Sinsheim, the 747 is at the Technik Museum Speyer.
Speyer only has a 4100' Runway, right next to a 1000 year old cathedral.
Not the proper place for a 747.
http://www.technik-museum.de/endex.html Speyer and Sinsheim Museum Home Page in English.
Regards.