This project is about two well-known architects, Antoni Gaudí and Álvaro Siza Vieira, that have different ways of doing there work. Antoni Gaudí is best known for his Catalan Modernism architectural style in the 19th and 20th century, and his inspiration was the Neo-Gothic and organic styles. In the other hand Siza Vieira is one of the leading architects of the twentieth century and one of the names to which Portugal is associated abroad, assuming a modernist and avant-garde perspective, recognizable in its architectural forms and senses.