Casa Trinxet was a building designed by the Catalan Modernisme architect Josep Puig i Cadafalch (also architect of Casa Amatller) and built during the years 1902–1904, officially considered completed in 1904. It was located at the crossroads of Carrer Balmes and Carrer del Consell de Cent, in the Eixample district of Barcelona, Catalonia, Spain. Casa Trinxet was "one of the jewels of Barcelona Modernisme" and one of the buildings of Barcelona's Illa de la Discòrdia ("Block of Discord"), because of competing attitudes among Domènech i Montaner, Puig i Cadafalch and Antoni Gaudí.