Madeleine Vionnet

If this site had a patron saint of construction, it would probably be Madeleine Vionnet. She's often called "the architect of dressmakers," and she's the designer I'd most want to have watched at work. She didn't invent cutting on the bias - tailors and dressmakers had used bias strips for collars, trims, and facings for centuries - but she was the first to build whole garments on the bias with real mastery, and the bias-cut evening silhouette that defines the 1930s is, in a very direct way, her creation.

Vionnet had opened her house in 1912, closed it during the First World War, and reopened in 1919, so by the 1930s she was an established, deeply respected couturière at the height of her powers. Her method was unusual. Rather than sketching, she draped fabric directly onto a small wooden doll, about half life-size, pinning and adjusting until she had the design, then scaling it up. That let her understand how a piece of cloth would fall and stretch in three dimensions, and it shows in the finished gowns: seams spiralling around the body, triangular insets and handkerchief points, and cowl necks that fall into perfect folds. Her work is covered in more technical detail in the bias cut construction entry.

I also love that she took her craft seriously as intellectual property. She fought hard against copyists, photographed her designs from several angles for a record of each one, and put her own thumbprint on her labels as a mark of authenticity. When war came in 1939 she closed her house for good and retired, and never reopened. What she left behind is a way of thinking about clothes - that cut and fabric grain could do the work that boning and padding had done before - that still shapes how designers work with fluid fabrics today.