I posted earlier about the (semi) disaster while installing the foyer ceiling medallion. The living room went much better, mainly because Chelsea shamed me into not trying to install it by myself. I knew if I broke it after she told me to wait for her to help I’d be in big trouble. That was wise. This one is 38.5 inches x 38.5 inches at the widest points and weighs 33 pounds, so trying to hold it up with one hand while setting the screws would have been close to impossible.
I’m not sure how many more rooms will have medallions. Likely, there will be one in the dining room and Chelsea can decide about the library.