10Trinity College Library, Dublin, Ireland

The Long Room at Trinity College Library in Dublin is one of the most famous libraries in the world. Built in the 18th century, this majestic space stretches nearly 65 meters and houses over 200,000 of the library’s oldest books. The dark wood, towering bookcases, and high arched ceiling create a timeless atmosphere. Among its treasures is the Book of Kells, an illuminated manuscript dating back to the 9th century.