Last time I visited OFFF festival I took an hour to find the earlier gem in Gaudi's architectural masterpieces - a summer home for real-estate broker Manel Vicens i Montaner. Heavily influenced by "Mudejar" style. Hence it was still under renovation, and I am happy to find out now that it is opened to public in 2018.
Casa Vicens marks the first time Gaudí utilized an orientalist style, mixing together Hispano-Arabic inspiration. This was a style of architecture that completely breaks with the norm of the period. Not only does this house mark Gaudí's coming of age, being his first major work of architecture, but it also represents the flowering of Catalan modern architecture.