Believe it or not, it's secrued with about a hundred hidden cleats as well as ties directly through to the ceiling joist in the ceiling above. This house is in LA, so earthquakes are always an issue for anything hung on the ceiling!

There is now a light fixture that mounts to the ceiling, from Global Views... the same maker as the mirror
http://www.globalviews.com/productdetails.php?id_class=2926&id_ctg=7&currentPageNum=1

I love this ceiling...I am a decorative artist wanting to do a verre eglomise ceiling for a designer showhouse and need to convince the designer that the installation is doable. Can you provide me the contact for the installer so that I can see how they did it? Feel free to email me at dee@deelitedesign.com. THANK YOU!! Dee

No question, just this is one of my favorite rooms ever. It is ridiculously elegant and interesting and feminine.