An old Window is now an old Mirror?

 I have the most thoughtful boyfriend. I saw this old window at an antique shop. I love the shape. Not too big or too small. I love the lead glass, the diamond pattern. I knew it could be a fun project. But it was the holidays and I wasn't spending any money, except on presents for my kids and my boyfriend. So I passed it up, and forgot about it. Then Christmas came, and there it was under...