Casa Calvet (Catalan pronunciation: [ˈkazə kəɫˈβɛt]) is a building, designed by Antoni Gaudí for a textile manufacturer which served as both a commercial property (in the basement and on the ground floor) and a residence. It is located at Carrer de Casp 48, Eixample district of Barcelona.

Gaudí scholars agree that this building is the most conventional of his works, partly because it had to be squeezed in between older structures and partly because it was sited in one of the most elegant sections of Barcelona. Its symmetry, balance and orderly rhythm are unusual for Gaudí's works. However, the curves and double gable at the top, the projecting oriel at the entrance— almost baroque in its drama, and isolated witty details are modernista elements.

Bulging balconies alternate with smaller, shallower balconies. Mushrooms above the oriel at the center allude to the owner's favorite hobby.

Columns flanking the entrance are in the form of stacked bobbins— an allusion to the family business of textile manufacture. Lluís Permanyer claims that "the gallery at ground level is the facade's most outstanding feature, a daring combination of wrought iron and stone in which decorative historical elements such as a cypress, an olive tree, horns of plenty, and the Catalan coat of arms can be discerned".

Antoni Gaudí i Cornet (Catalan pronunciation: [ənˈtɔni ɣəwˈði]; 25 June 1852–10 June 1926) was a Spanish Catalan architect and figurehead of Catalan Modernism. Gaudí's works reflect his highly individual and distinctive style and are largely concentrated in the Catalan capital of Barcelona, notably his magnum opus, the Sagrada Família.

Much of Gaudí's work was marked by his four life passions: architecture, nature, religion and love for Catalonia. Gaudí studied every detail of his creations, integrating into his architecture a series of crafts in which he was skilled: ceramics, stained glass, wrought ironwork forging and carpentry. He introduced new techniques in the treatment of materials, such as trencadís, made of waste ceramic pieces.

After a few years under the influence of neo-Gothic art and Oriental techniques, Gaudí became part of the Catalan Modernista movement which was reaching its peak in the late 19th and early 20th centuries. His work transcended mainstream Modernisme, culminating in an organic style inspired by nature. Gaudí rarely drew detailed plans of his works, instead preferring to create them as three-dimensional scale models and molding the details as he was conceiving them.