Here's a pretty little confection. It is a ready made curtain panel, meaning you can buy it as is.
This is from a company called Emdee. While I don't usually suggest you purchase your window coverings ready made, because so many are cheaply made and unlined, in this case you wouldn't want it lined. I love the sheer extravagance of this curtain, and the way it was installed so the hemline just drips along the floor.