These are windows from the Heidelberg Castle (Renaissance), Gersfeld, Schwetzingen and Mannheim palace (all three Baroque buildings).

Heidelberg, Mannheim and Schwetzingen are in close proximity of each other – one can see that sandstone is a prevalent building material in the area.  Gersfeld is not that far away, about the same distance from Frankfurt to the north-east as the others are south.

Linked to Monday Window.