At both sides of the reading hall the office rooms were situated; to the right a large office room of the imperial commissioner or his representative, very tastefully equipped in modern style.  The walls were wainscoted in oak and had capacious book shelves.  From the ceiling, the beams of which were ornamented, numerous lamps and large candelabra were suspended.  The room was completed by a comfortable fireplace, and to the left side of the room, or reading hall, were office rooms.

The upper center hall, with its eight columns, was a copy of the center hall of the Charlottenburg Palace, and in its quiet dignity highly characteristic of the Prussian development of the art of the Baroque.

In front of the nether window, between two columns, was placed the bust of the German Emperor in the uniform of the Gardes du Corps, with the eagle helmet, from the royal porcelain manufacturer in Berlin.

Another interesting feature of the German Building was the Gobelin hall.  The rich ceiling in its pure plastic was modeled after the Elizabeth hall in the royal palace of Berlin, the stucco figures, as well as the decorations of the ceiling, likewise the golden medallions at the four corners, representing a procession of bacchantes, while the rich door panelings were modeled in the royal palace and placed here.  The walls all around were wainscoted with palisander.  But the main interest in this room centered in the four mighty gobelins.  These gobelins were, by the charm of their colors and the delicacy of the composition, a source of enjoyment to every lover of art.

The Gobelin hall was laid out with a gorgeous modern carpet from the carpet works at Barmen.  Of surprising delicacy were the curtains and the golden hangings above the windows, all masterpieces of the modern art of weaving, as were those all over the house made by the concern Hertzog in Berlin.  The great candelabra of bronze and mountain crystal were lighted by wax candles.

Off the Gobelin hall was one of the richest rooms of the castle, the Bradenburg chamber.  This red-velvet chamber was used for one of the most brilliant ceremonies in the royal palace, the solemn decoration of the Knights of the Order of the Black Eagle.

Adjacent to this rich room was the main hall of the Deutsche Haus, the famous oak gallery, 115 feet long and 20 feet broad.  The oak gallery forms in Charlottenburg the most important apartment of the castle and is characteristically German.  The combination of the simple oak wood with the delicate gold carving produced a most original and most restful effect.  The wonderful dimensions, the beautiful material, the harmony of colors, and perfection of artistic details all combined to impress the observer.  The entire length of the long wall was divided into niches by pilasters.  Each niche contained a mirror and over that a picture from the ancient classics.  Along the walls of the hall were placed on marble pedestals the busts of former Prussian rulers.