concrete home, the sandstone and base concrete slab do not touch each other, and the house sits on piers dug into the sandstone ground. The house has three upper levels that are only partially open to each other, and a fourth lower level. On the top level is the kitchen and dining room, a small gallery and a balcony. The second level has the living area with balcony and master bedroom. Both these (upper) levels share the same ceiling which is under the roof—and is lined with Tasmanian oak. A large pool and outdoor area was added in 1976. The home is surrounded by natural Australian bush in a suburb which is only 15 km from Sydney's central business district. The home is furnished with 1960s and 1970s modernist art works and modern furniture by Breuer and Eames. The building occupies a steep bushland site, sloping westwards to a creek. The building is approached from the road at the top and steps down from a cantilevered garage through four half levels which follow the slope of the land. The structure consist of four suspended concrete trays supported by reinforced concrete block traverse blades which divide the building into north facing daytime/active spaces, a central circulation spine and night time/passive spaces. The top level consists of kitchen, dining and study, the next living room and main bedroom, the third children's room and bathroom, with studio, laundry and guest bedroom at the bottom having access to the garden. The house embodies both a vertical and horizontal extension of space. The level changes and central open well provide a visual link from top to bottom. Large areas of glass and projecting terraces draw the eye out from each level to the natural landscape setting. Materials include board formed reinforced concrete, rubble stonework, white concrete block work and Tasmanian Oak boarded ceilings. The integrated artworks include K Nolan, Frank Stella, H Frankenthaler, work by Sam Frances, a Charles Perry sculpture, Max Bill, several "Positive-Negative" sculptures by Norman Carlberg and two Calder stabiles. The garden contains a sculpture by the Los Angeles sculptor Eric Orr. Occupancy Harry and Penelope Seidler moved into the building on Harry Seidler's birthday in 1967 and lived there for the remaining years of his life. Harry Seidler suffered a paralytic stroke on late 24 April 2005 and died of sepsis on 9 March 2006. , Penelope Seidler continued to reside