Beautiful pinkish purple inverted bell-shaped flower

This plant enjoys semi shade. There are several bells on each stem. Leaves are pointy and serrated. The plant reaches between 1 and 2 feet and bends under the weight of the flowers. It self seeds or otherwise propagates itself in a cluster but does not seem to be invasive. I've posted a picture - hope it uploads. Any ideas what it's called?

 

Campanula punctata

 

Thanks! I thought it was a wildflower because I found it growing at the cottage. Looking up the images on the internet under Campanula punctata, I found an image that matches pretty closely: Campanula punctata ‘Cherry Bells‘

 

That particular selection has been prevalent in commerce.