The Illa de la Discòrdia, or Block of Discord, is a famous city block located on the Passeig de Gràcia in the Eixample district of Barcelona. The area is notable for its high concentration of buildings designed by four of the most influential Modernista architects: Lluís Domènech i Montaner, Antoni Gaudí, Josep Puig i Cadafalch, and Enric Sagnier.
Constructed during the early years of the 20th century, the buildings are characterized by their starkly different aesthetic styles. Because each architect brought a unique vision to their respective structure, the buildings create a visual clash with one another and the surrounding architecture. This juxtaposition of competing design philosophies has made the block a significant point of interest for students of urban history and architectural theory.