Seems that they're posing for this shot.
Thank you for your kind words.
They were a welcome sight at the end of a long day.
I think this must be the Campanula patula
flowers from may till Juli and it loves borders of roads and paths.
Based on the info you gave I had a look around.
Is it not rather one of these two?
Fairies' Thimbles / Dwarf Bellflower (Campanula cochlearifolia)
Alpine Bellflower (Campanula alpina)
I looked to all the different bells and after a better look I think it's Harebell (Campanula rotundifolia) I think it that becauce of the leaves you see. And it's the most commom Campanula you see in Europe.
Looks like Campanula rotundifolia to me as well. This species exists all over the world.
Thank you both of you, I have updated the description accordingly.