It would be this.
This illustration was made by Mela Koehler, if you would like to see more of her work click here. I believe the fabric used for the dress was designed by Koloman Moser. Evening gowns are pretty, but the simple lines and bold prints of the Weiner Werkstätte trump lace and beads for me. Is anyone going to be wearing their sew along corset under a simple day dress? With or with out a giant hat like the one shown here?