Consider them the grandparents of today's design world.
Any history lover knows that the best way to move forward is often to study the past. That's especially true in design, where styles pioneered by creatives of old continue to inform the basis of new designs today. Here, we've gathered 25 interior designers whose names—and work—you should know, either because they were pivotal in ushering in a new style and their influence continues to be celebrated today, or because it was overlooked. As they say, good design never truly goes out of style; indeed, while perusing this list, you may just notice the origins of some of your favorite looks. Read on to complete your Designer History 101 course.