The Terrades sisters owned three buildings standing between the Avinguda Diagonal, Carrer Rosselló and Carrer Bruc. Josep Puig i Cadafalch was commissioned to redevelop the buildings and linked them together on one site behind a vast brick façade. His project, which was completed in 1905, resulted in an imposing triangular structure which rises up like a grand medieval castle with four turrets, one on each corner. The nickname, “Casa de les Punxes”, comes from the conical roofs, which end in a spike.