What’s the largest library in the world? If you guessed the Library of Congress, you would be right. As well as being the research library that officially serves the U.S. Congress, it is also the de facto national library of the country. The library’s collection is the home to millions of items, including books, recordings, photographs, maps and manuscripts. Alexandria, Va., photographer Jeff Olson visited there earlier this week and shot these images of the Thomas Jefferson Building, which houses the library and is recognized as a premier example of the Beaux Arts style, which is theatrical, heavily ornamented and kinetic. A monumental split stair featuring the Neptune Fountain, rises in multiple flights to the main entrance.