Even if you’re not a fashion maven, you’ve probably come across Diane von Fürstenberg. If you’ve ever donned a wrap dress — those soft jersey, subtly A-line, generally flattering-to-all belted numbers that became popular in the ’70s and have stuck around since — well, then, you’ve worn something that’s a descendant of a von Fürstenberg design, if not one of the originals, because she is widely credited with inventing the style.