This is another of the ceilings of one of the ten reading rooms of the library. These reading rooms are not all currently used for reading but some are used for exhibits. For example, one is used to display US President Thomas Jefferson’s collection of books which was offered by him to the Library of Congress to form the basis of the current library.
The Library Of Congress is the reference library for the USA’s Congress. It has the world’s largest collection of books, 35 million volumes in over 650 miles (1050 km) of bookshelves.