Casa Bofarull by Josep Maria Jujol (Tarragona, 1879 – Barcelona, 1949) is the starting point for understanding an architectural approach present in many buildings where the architect is faced with a pre-existing feature (physical or otherwise) and blends the new and old layers to beget a new architecture that is able to combine them harmoniously. The proposal will show the process and perception of a series of examples of Catalan architecture that begins with Jujol's work.