3Biblioteca Joanina, Coimbra, Portugal

The Biblioteca Joanina, located at the University of Coimbra, is a stunning example of Baroque architecture. Built in the 18th century, the library’s interior is lavishly decorated with exotic woods, gilded carvings, and intricate ceiling paintings. The library’s collection includes thousands of rare books and manuscripts. Its exquisite design and historical importance make it one of Europe’s most beautiful libraries.