3The Royal Library of El Escorial, Madrid, Spain

The Royal Library of El Escorial, situated within the El Escorial Monastery near Madrid, is a UNESCO World Heritage Site.

Built in the 16th century, this library houses an impressive collection of over 40,000 volumes, including rare manuscripts and codices. The library’s design reflects the Renaissance ideals of symmetry and proportion, with rows of shelves flanked by imposing columns and adorned with intricate ceiling frescoes.

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