Casa Batllo is a modernist building designed by the architect Antoni Gaudi, leader of the movement, from 1905 to 1907. It is located in the Illa de la Discordia, at 43 Passeig de Gràcia.
The building was commissioned by Josep Batlló i Casanovas, textile industrialist. The most famous part of the building’s facade, considered one of the most original architect, who used stone, wrought iron, glass and Trencadís polychrome ceramics, Gaudí became assist by architects Josep Maria Jujol and J oan Rubio i Bellver.
The building, which is on the World Heritage List of UNESCO, is open to the public and received 600,000 visitors in 2011.