stores and cash handling areas. Originally they also contained extensive plant areas. The Strong Rooms are located in the basement originally used for the storage of bullion and cash. They have a degree of technical significance for their innovative use of concrete and metal sheet to create an impenetrable surround for the strong rooms. The metal strong room doors are significant for their size and sophistication. The ground floor is symmetrical around the central main vestibule which is a two-storey volume with a general banking chamber on the western side and a public display area on the eastern side. The display area replaces the former Bonds and Stock Banking Chamber of the original design. The ground level entrance foyer/vestibule remains substantially intact including internal finishes of Wombeyan marble to the south wall, granite floor, east and west Imperial granite walls including high-level glazing, anodised aluminium ceiling and the south wall relief by Bim Hilder. Alterations include the introduction of a security desk, new entrance doors, and reconfigured glazing. The mezzanine is set back from Martin Place frontage creating an atrium over the ground floor. With the first and second floors it forms a podium from which the office tower springs. The third floor housed the staff amenities area with a staff cafeteria and kitchen, an auditorium and staff library and a staff lounge outside the lift foyer. These areas were originally designed with a distinctive character which has now been altered by later refurbishments. The eleventh floor contains the board room (featuring a marble floor), board dining room, board members common room and reception and meeting areas. The twelfth floor contains the governor's suite, reception areas and executive suites. The 16th floor housed two residential flats, but the flats have been removed in recent works. The floor also included the medical centre. The 17th to 19th floors held two squash courts and an observation gallery was located along the northern facade. These were all removed in recent works. The 20th floor houses staff amenities. Most lift foyers are marble lined, Level 3 is timber. Some of the original furniture designed for the building including tables, chairs, couches, credenzas and desks remain within the public spaces, offices and special areas of the building. The Westpac (former Bank of NSW) building erected on the opposite corner to the Reserve Bank occupies a similar footprint and has a similar mass, providing a gateway