Our Michelangelo Series of medallions come completely finished and ready to install on your ceiling. The medallions project 3-4" out from the ceiling so they provide another element of depth to the room. They are built from fiberglass, pvc, and other high-impact materials and come ready with a hole in the center for your lighting fixture. If you are not installing a lighting fixture with the medallion then you can still use these by ordering a small rosette to cover the medallion's center hole. The ceiling medallions are flat on the back so they can be installed on any flat ceiling or wall. They are delivered fully assembled so they are easy to install. Since these are large medallions be sure to have at least 2 people involved with the installation.