Much of the ship is decorated to standards of luxury that are unequalled in a seagoing vessel of the time. These include a library containing about twelve thousand books, with boxed collections of valuable oceanic specimens. The library is also filled with expensive paintings and other works of art. "Nautilus" also features a lavish dining room and even an organ that Captain Nemo uses to entertain himself in the evening. By comparison, Nemo's personal quarters are very sparsely furnished, but do feature duplicates of the bridge instruments, so that the captain can keep track of the vessel without being present on the bridge. These amenities however, are only available to Nemo, Professor Aronnax, and his companions.