Lot of us are just starting to wake up now. I hope you get a response later today. The first time you posted in Sept, it may just have been a busy period and didn't get viewed by the right person before it got pushed down the line by newer threads.
I don't think C. trachelium in which corolla (more purple) is expanded and importantly calyx lobes are much shorter and broader (l and b ratio). To me leaf shape and texture, corolla shape and colour and more importantly calyx resemble Campanula bononiensis
Dear Mr. Gurcharan, Many thank for the link. It is the same site which I use constantly for checking my photographs. The sp. bononiensis certainly looks similar, but as the site indicates, it is lacking in the region where I live. It very often happens that flora believed to be lacking in some regions are sometimes discovered growing in those very areas. I have found plants that are considered non existent in my area; in these very, very few cases I notify the Univ. of Naples. Best wishes