Pulling dimensions off this lone picture would be possible, easy even. Coming up corner and panel joinery would be one of just a few options. Trim profiles could be anything you want, from homedepot to one-off custom. What about the cornice carving and bust, what do you want them to look like? Then of course there's engineering the concealed door to the interior where the secret rituals occur...and that's all before we get to the details of the chair.
For now just the coarse X,Y,Z dimensions overall and components. Trim, corners, detail, chief bust, etc, to be determined.
