Casa Amatller is a modernist building in Barcelona adjacent to Casa Batlló and close to Casa Lleó Morera. It was designed by the architect Josep Puig i Cadafalch between 1898 and 1900. The three buildings form what is known as The Apple of Discord, alluding to the mythological dispute between the goddesses Hera, Aphrodite and Athena, as they are considered to be those of greater beauty.

The building was commissioned by the chocolate industrialist Antoni Amatller to Josep Puig, who devised a model of an urban Gothic palace, with a flat façade, a central courtyard and a staircase that gives access to the main rooms.

On the façade you can see the two asymmetrical doors linked by a Saint George made by the sculptor Eusebi Arnau. Throughout the façade there is a sgraffito that joins the ceramic in a delicate way

The style is a mix between Catalan Gothic and Flemish (characterized by the flat triangular shape of the upper part of the façade).