That's not a door - It's a window...
...and the window treatment is a custom Roman Shade.

Hi there, that's actually a window, hard to tell from the photo. It's a Osborne and Little textile as the outside roman shade. A second shade is the plain white sheer with a black trim. That textile is an inside mount roman shade. Both are custom window treatments made by my seamstress!

The window treatment is beautiful.........! And thanks for the clarification re window vs door.