Hello!

I need help trying to find the title of a german movie?

Synopsis: with a slipper/shoe fell behind an immense organ in a church/cathedral... Atmosphere Gothic cathedral, organ...
The heroine loses a shoe and takes years to find him because he fell behind the organ...

Thank you for your help!

It is not: The Yellow Slippers (1961) de Sylwester Checinski neither The Magic Galoshes (1986) de Juraj Herz

Always looking up movie! Thanks!