9British Library, United Kingdom

The British Library in London is home to more than 170 million items, making it one of the largest and most important research libraries globally. Its collections include books, journals, maps, stamps, music, patents, and manuscripts from across the globe. 

Among its treasures are Leonardo da Vinci’s notebooks, the Magna Carta, and original works by Shakespeare. The British Library is both a cultural landmark and a research hub, attracting scholars worldwide.