participated in the war. According to Dellit, the names 'complete the message which the group of sculpture symbolising "Sacrifice" is intended to deliver'. Located on the north–south and east–west axes, the room has three large silky oak double doors, gold painted, that slide open into wall cavities. Two of the doors are now permanently left open and glass doors installed in front of the reveals to allow visitors a view of the sculpture "Sacrifice" from inside the Exhibition space and the Assembly Hall. Sacrifice At the heart of the memorial is the bronze sculpture, "Sacrifice", by Rayner Hoff. It powerfully symbolises the sacrifice made in times of war by both those who go to fight and those left behind. The sculpture can be seen from above through the Well of Contemplation, with heads bowed, or at ground level from the vestibule, Assembly Hall and Exhibition space. The sculpture is also visible from Hyde Park, as originally proposed by Dellit, with glazed eastern doors to the Assembly Hall. Hall of Memory The "Hall of Memory" is also a circular room that occupies the podium level of the building centred on and located directly above the "Hall of Silence". The large external staircases that lead to the external timber sliding double doors on the podium level on the northern and southern sides were intended to form the grand entrances to the memorial. The "Hall of Memory" is clad in Ulum marble. In the centre of the room, carved in the form of a wreath is the marble balustrade around the "Well of Contemplation". Located in the four "corners" of the room are semi-circular "Niches of Remembrance", each devoted to one of the major theatres of World War I in which Australians fought, and each commemorating the names of major campaigns in those theatres. The name of the theatre is carved in relief into the face of the marble wall at the top of each niche with the names of the battles beneath it, another example of the fusion of sculpture and building. At the base of each niche, laid in the paving is a headstone from Flanders, Gallipoli, Palestine and New Guinea. Above the tall niches are marble cast bas reliefs by Rayner Hoff that represent the Army, Navy, Air Force and Army Medical Corps and therefore correspond to the four large standing external sculptures. Hoff called them "The March of the