In Spain, the movement was centred in Barcelona and was an essential element of the Catalan movement Modernisme. Architect Antoni Gaudí, whose decorative architectural style is so highly personal that he is sometimes seen as practising an artistic language separate from Art Nouveau, is nonetheless united with the movement by his use of floral and organic forms. His designs from around 1903, the Casa Batlló (1904–1906) and Casa Milà (1906–1908), are most closely related to the stylistic elements of Art Nouveau. However, famous structures such as the Sagrada Familia characteristically contrast the modernising Art Nouveau tendencies with revivalist Neo-Gothic. Besides the dominating presence of Gaudí, Lluís Domènech i Montaner also explored the Art Nouveau language in Barcelona in buildings such as the Casa Lleó Morera (1905). Another key figure is Josep Maria Jujol.