What could be more amazing than stepping into the homes of the ultimate arbiters of style—fashion designers—and checking out their decorating choices? That’s exactly what InStyle has been doing since it first launched 20 years ago, asking designers and celebrities alike to open up their homes and show readers how they express their personal style in their living spaces.

Take Christian Louboutin’s 13th-century medieval castle on 22 acres in Western France (above) where each treasure-filled room reflects his passion for global bazaars and antique emporiums, like a 16th-century tapestry and a giant stuffed boar that holds napkin rings.

But at the end of the day, if you take away Domenico Dolce and Stefano Gabbana’s zebra-printed chairs or Valentino’s Chagall paintings, designers, like us, crave the comfort and beloved escape that home provides. As Giorgio Armani said of his fortress, “when I close the door … Milan doesn’t even exist anymore. I am surrounded by the fullness of my life.”

Ready to go window peeping? Check out our gallery of InStyle’s favorite designer homes featured within our pages over the last 20 years.