Once you have one of these windows of your own, how do you display them? My favorite way is to just display them over the inside of an existing window. Most of them fit the space (being old windows themselves). The down side is you have to go through some hassle if you want to open the covered window. However, there are many situations where this is just fine or even desirable. For example, in my bathroom, I have two windows that both happen to be on the front of my house, so if you are standing on my front porch, you could peer right into the bathroom. Not much privacy. So I mounted this Clematis flower in the window over the tub. We can still open the top half of the window if we want, but we usually just open the other window that is in the same room if we want some fresh air. It couldn’t be easier, either – just get a couple (four is really probably best) of inexpensive mirror mounts at the hardware store and screw them into the window trim. The window sill provides support, as well. See below.
There are other ways to do it, but this is my favorite way – easy and very sturdy / secure. Another way is to use eye screws and put them into the wood frame. This method is better if you need to open the window behind the mosaic, but can be tricky with old windows that might not have the best frame.