Use clear epoxy and candlesticks or milk glass vases in between. Also looks cute with a flipped upside down teacup and saucer as pedestal for cupcakes. The epoxy comes in two connected tubes and you have to mix them together before using. E-6000 is a great glue for ceramic and porcelain.
DIY: Decoupage Plates - Sometimes a large, empty wall is the elephant in the room. The space can be hard to fill, yet just as awkward to leave empty. I think a collection of similar objects, such as decoupaged plates, is the perfect solution. Clear glass plates are easy to find, and I use color copies of my own hand-painted designs as the artwork to back them.