Though style is always evolving and consistently breaking new barriers, there are so many influential fashion icons who are trailblazers in every sense of the word. The world has been blessed with models, actors, performers and designers who created what we would consider “classic” styles today, along with bold looks most of us could only dream of one day emulating. The fashion legends of decades past are the reason we have so many incredible styles from which to choose—and  have influenced nearly every fashion trend to appear from our favorite designers and brands.

From Marilyn Monroe and her iconic white halter dress (You know the one!) to Princess Diana’s relatable, casual style—no matter the fact that she was actual, legitimate royalty—and Naomi Campbell’s influence as a world-famous supermodel in the ’80s and ’90s, there are so many figures who have shaped how we see fashion today. Of course, the evolution of style is ever-changing and adapting to our current world, but we’d be nowhere without the influential fashion icons who have led the way with their legendary ensembles and fearless attitudes. If there’s a trend you absolutely love, odds are, it was inspired by a fashionista from history.

Because it’s always a good idea to know where we’ve been before we can keep moving forward, you’ll find a list of some of the most influential fashion icons of all time below—and the reasons…