The Biblioteca Pública Arús is a modernista sanctuary of thought located on Passeig de Sant Joan. Stepping through its doors is like entering another era: warm light, dark wood, display cabinets and a quiet that invites unhurried reading. Housed in the former home of Rossend Arús, the library has preserved its spirit of free thinking. Its rooms hold thousands of volumes devoted to 19th- and 20th-century society, with a particular focus on social movements, critical thought and Freemasonry. It remains an essential place for understanding enlightened Barcelona.

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Today, beyond its well-known dragon lamps and its iconic Statue of Liberty, the Arús continues to serve as a place for those seeking answers away from the noise and distractions of contemporary life. Browsing its shelves means entering one of the most significant Masonic collections in Europe. Among manuscripts, medals and rare books, traces of debates on equality, progress and education that shaped Barcelona over a century ago still seem present.
The Arús is not tied to the past: it hosts film forums, talks and history-related educational activities. Students, researchers and those interested in critical thought share the space, where Barcelona continues to read, debate and reflect.