I don't know much about flowers, or plants, but these sure are pretty.
I'll agree with SWMBO because...you know...she's SWMBO! ;)
It must receive a lot of visitors!
I bought a Rose of Sharon bush years ago and it turned out to look just like this one. Not the flower I remember by that name but the garden guy said it was a fancy double. But then, that could have been fancy double talk.
Meggie tells me the leaves aren't right for a camelia so your Rose of Sharon may be correct.