Between 1904 and 1910 he constructed the Casa Batlló (Batlló house) and the Casa Milà (Milá house), two of his most emblematic works.
Ne mes viteve 1904 dhe 1910 ai ndërtoi Casa Batlló (shtëpia Batllo) dhe Casa Milà (shtëpia Mila), dy nga veprat e tij me emblematike.