Sterling Cooper and Partners is an agency whose reputation is built on a progressive approach to advertising. So it has made sense, throughout the last few seasons, to see Herman Miller’s mid-century aesthetic seep into the offices designed by Mad Men’s set decorator Claudette Didul-Mann. An Eames Time-Life chair shows up in Roger’s office; Don gets an Aluminum Group chair. And for good reason. Herman Miller helps to visually represent the cultural evolution at the heart of Mad Men.