A vast library, the domed Radcliffe Camera, usually surrounded by tourists with cameras trained at its golden-stone walls, is Oxford's most spectacular building, constructed in 1737–49 by James Gibbs in Italian baroque style. It contains part of the Bodleian Library's enormous collection, begun in 1602 and one of six "copyright libraries" in the United Kingdom. Like the Library of Congress in the United States, this means it must by law contain a copy of every book printed in Great Britain. In addition, the Bodleian is a vast repository for priceless historical documents—including a Gutenberg Bible and a Shakespeare First Folio. The collection continues to grow by more than 5,000 items a week.
Guided tours—three to six of them daily except when private events are being held—reveal the magnificent Duke Humfrey's Library, which was the original chained library, completed in 1488 (the ancient tomes are dusted once a decade) as well as the spots used to create Hogwarts in the Harry Potter films. Standard tours can be prebooked, as can the extended tours on Wednesday, Saturday, and Sunday. Otherwise, arrive early to secure first-come-first-served tour tickets. Audio tours don't require reservations.