As explained by Nouvel himself, the construction was strongly influenced by one of the most representative symbols of Catalan culture. One side references the bell towers of the Sagrada Familia by the Catalan architect Antoni Gaudí. (These bell towers were based in turn on the idea of the Hotel Attraction, a course project by the teacher Reus in 1908 for some New York hoteliers, which was redesigned in 1956 by his disciple Joan Matamala. These designs were included in Rem Koolhaas' book "Delirious New York", a reference for many architects.) An additional tribute to the Sagrada Família lies in the north side of the tower, which was designed with the intention of obtaining an optimal view of the cathedral.