You would have found similar baubles in 18th Century Constantinople, where and when these beautiful hand painted votive eggs were fashionable. To hang from the chain that you see in the photo. Susan Deliss spotted similar decorative baubles recently in the Tile Kiosk at the Architectural Museum in Istanbul. As one does.
Susan Deliss doesn't know what the purpose for these baubles was, except for adding a bit of random colour and decoration, presumably originally for the Orthodox Christians in Constantinople. Susan Deliss hangs them from hooks on the walls and from ceilings. Each egg is hand painted so slightly different from the others.