Casa Amatller is an architectural gem of Catalan Modernism, built by the architect Puig i Cadafalch for the industrialist chocolatier Antoni Amatller between 1898 and 1900. Visitors have the opportunity to visit an authentic modernist house with its original decoration.

Casa Amatller broke for the first time the ornamental sobriety and the limits of height during the period. In the facade Puig i Cadafalch reinterpreted diverse styles and played with the asymmetries and the Chromatism. The decoration of the whole House develops an iconographic programme concerning the Amatller family and the hobbies of Antoni, such as the Photography. Puig i Cadafalch skilfully combined Catalonia's home-grown art nouveau style, modernism, based on the use of traditional arts and crafts, with a neo-Gothic style and an unusual stepped cornice inspired by the houses of the Netherlands. Some of the finest artists of the time, including Jujol, worked with Puig i Cadafalch on the project. The house retains all its original furnishings and decoration, as well as an outstanding archaeological glass collection.