 The frame of the building was constructed from reinforced concrete , which was then clad in Portland stone . Several highly detailed sculptures adorn the outside of the building , including ones of Britannia and Neptune , as well as others representing peace , war , and storms . There are also sculptures of the Zodiac and the coat of arms of the United Kingdom 's allies during the First World War . Another series of sculptures on the building depict different races from around the world , which reflect the global operations of the Cunard company . Marble was used to furnish several parts of the inside of the building , particularly on the ground floor corridors that link the north and south entrances . It was imported from several locations in Italy and Greece , including Attica , Carrara , and Arni Alto . 
