This penthouse occupies the top two floors of a new residential tower in St. Louis, overlooking the Mississippi River and the Saarinen Arch. It is designed for a couple with a significant contemporary art collection. The owners requested that the design accommodate spaces for entertaining and the display of the collection. The design presents museum quality space with flexible lighting to allow for collection rotation. The private elevator hall, entry hall and gallery create a gracious sequence of circulation which delays the impact of the dramatic views until one either ascends the stairs to the family room and terrace or until enters into the living and dining areas. The open spaces of the galleries and living areas contrast with the intimate library and kitchen.