This really may be it. Schloss Mainberg in Schonungen, Germany (not Schweinfurt, I guess?). And all purely by accident that it was probably taken in the same place the pics were developed! Note faint red circles around turret dome and steeple. Glad I stopped looking in France.
Don’t miss this either-just found it-if you’d like to see more.
http://s60.photobucket.com/user/mordfilm/slideshow/Schloss%20Mainberg
And this:
https://www.youtube.com/watch?v=4IRoidJzNk0
Credit:stackoverflow.com‘