@keyframes hintergrund {
  0% {background-position: top;}
  50% {background-position: bottom}
  100% {background-position: top;}
}
.startseite header {
  background-image: url(../../../images/gallery/weimar-goethe-w.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 60s ease infinite;
}

.altaere header {
  background-image: url(../../../images/gallery/altaere-ebeleben.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 60s ease infinite;
}

.dekorationsmalerei header {
  background-image: url(../../../images/gallery/gera-v.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 40s ease infinite;
}

.emporen-und-kirchenausstattung header {
  background-image: url(../../../images/gallery/emporen-muehlhausen.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 80s ease infinite;
}

.fassaden header {
  background-image: url(../../../images/gallery/fassaden-langensalaz.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 80s ease infinite;
}

.holz header {
  background-image: url(../../../images/gallery/holz-gera-tr.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 40s ease infinite;
}

.museumsexponate header {
  background-image: url(../../../images/gallery/museumsexponate-sonneberg.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 40s ease infinite;
}

.reinigung header {
  background-image: url(../../../images/gallery/reinigung-kunstgutverpackung.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 90s ease infinite;
}

.stein header {
  background-image: url(../../../images/gallery/stein-steinkonservierung.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 90s ease infinite;
}

.stuck header {
  background-image: url(../../../images/gallery/stuck-stuckrekonstruktion.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 40s ease infinite;
}

.wand-und-deckengemaelde header {
  background-image: url(../../../images/gallery/wand-berlsstedt-decke-os.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 40s ease infinite;
}

.wappen header {
  background-image: url(../../../images/gallery/wappen-thueringen.jpg);
  background-size: cover;
  background-position: center;
  animation: hintergrund 80s ease infinite;
}