the new house was considerably larger and grander than its precursors: it stood six stories tall; included a meeting hall with a seating capacity of 1,500; a reception hall with a standing capacity of 1,500; a library of over 50,000 volumes, and three additional floors of offices. the entrance hall and first floor stairways were constructed of marble, and the second floor hallway, reception hall, and meeting hall of granite, marble, and mahogany.