So why is the timing right for a Castle renaissance? Gordon says, "There's a great deal of renewed interest in his work because the timing is right for rediscovering and embracing a homegrown American designer of his stature. Also consider the scale of his oeuvre." It progresses quite wildly from the wooden, organic forms of the 1960s into the similarly-amorphous but colorful plastic furniture of the 1970s. Here, Castle's influential Molar Settee from 1969. The Molar group was designed as a sculptural alternative to contract furniture and was soon snapped up for The Museum of Modern Art's permanent collection.