Another midcentury icon, George Nelson's Marshmallow sofa features 18 circular cushions in a surprisingly comfortable arrangement. Introduced by Herman Miller in 1956, the piece can be upholstered in a number of fabric or leather options.  Photo 2 of 7 in How to Build a Classic Design Collection with Herman Miller by Allie Weiss

How to Build a Classic Design Collection with Herman Miller

2 of 7

Another midcentury icon, George Nelson's Marshmallow sofa features 18 circular cushions in a surprisingly comfortable arrangement. Introduced by Herman Miller in 1956, the piece can be upholstered in a number of fabric or leather options.