The walls and ceilings are decorated with of red and gold mosaics designed by Hildreth Meiere and manufactured by the Ravenna Mosaic Company in Long Island City and in Berlin. The ceiling had an allegorical painting measuring , depicting the influence of wealth on the creation of beauty, was made by Meiere and Kimon Nicolaïdes. The walls are made of Pyrenees black marble, and the columns are made of Verona red marble; a similar design was used in the Stockholm City Hall. The floor was made of red terrazzo tiles; Walker and his associate Perry Coke Smith personally supervised the creation of the floor tiles in Berlin. When the annex was built, the expanded lobby floor was clad in travertine, and the original lobby's ceiling was covered with a dropped ceiling.