The Royal Portuguese Cabinet of Reading (Portuguese: Real Gabinete Português de Leitura) is a historic library located in Rio de Janeiro, Brazil. It was founded in 1837 by a group of Portuguese immigrants with the aim of promoting Portuguese culture and literature among the local population. The building that houses the library is an architectural gem, with a neo-Manueline style facade that is decorated with intricate stone carvings, stained glass windows, and a beautiful spiral staircase.

The library's collection is one of the most significant collections of Portuguese literature and culture outside of Portugal, with over 350,000 volumes, including rare books, manuscripts, maps, and prints. The collection is particularly strong in the fields of Brazilian and Portuguese literature, history, and art, but also includes works from around the world in a variety of languages.

The reading room, which is open to the public, is a peaceful oasis in the heart of Rio de Janeiro, with high ceilings, antique wooden furniture, and beautiful stained glass windows. Visitors can peruse the shelves and read books on-site, and the library also hosts cultural events, including book launches, readings, and concerts.

The Royal Portuguese Cabinet of Reading is considered one of the most important cultural institutions in Brazil and is recognized internationally as a center of Portuguese culture and scholarship. It is a must-see destination for anyone interested in literature, history, or architecture.