It’s already a brag-worthy feat to own an apartment that was designed by an award-winning architect, but it’s even more brag-worthy to own one that was lovingly designed by that architect for her very own sister and her family. That’s why when we tell you that this 2,783-square-foot Tribeca pad in the landmarked Sugar Warehouse condominium is a gem, we mean it. The retro glam duplex loft was a collaboration between designer Stacey Ruhle Kliesch, her mother Louise Ruhle, and her sister, the homeowner, Stephanie Ruhle Hubbard. That’s right, even Mom was involved. So you know that every nook and cranny of this $5.2 million duplex loft was lovingly tended to.