Casa Amatller (Catalan pronunciation: [ˈkazə əməʎˈʎe]) is a building in the Modernisme style in Barcelona, designed by Josep Puig i Cadafalch. Along with Casa Batlló and Casa Lleó-Morera, it makes up the three most important buildings in Barcelona's famous Illa de la Discòrdia ("Block of Discord"), noted for its unique modernist buildings.