The Casa, covering an area of 6,245 m² spread over four floors and a basement, is a unique building with rich Modernist architectural elements. Structurally, it follows the Catalan Modernist tradition of ceilings made from flat brick vaults and metal beams that tension the supporting lowered arches, built with exposed sardinel brick.
The monumental entrance leads into the lobby, where the columns and capitals are made of natural stone, the arches and walls are of exposed brickwork, and the railings, sills, and balustrades are made of artificial stone. In this space, we find four murals with polychrome tiles that depict the history of the donor families who made the construction of the old Casa on Carrer del Carme possible: the coat of arms of the Gualba family, the Astor and Soler families, and the Ferran family The Ferran coat of arms, represented by a six-nail horseshoe motif, is repeated in the floor tiles of the building as a tribute to the principal benefactor of the first Casa de la Convalescència.
On the ground floor, all the rooms are adorned with friezes of majolica tiles, and there are preserved panels of tiles, manufactured in the factories of Esplugues and Manises, highlighting the virtues of Faith, Hope, and Charity, as well as other religious references. The stairs leading to the upper floors have marble or limestone steps.
The former chapel, now converted into the Aula Magna, has a strikingly vertical proportion with a large central dome supported by pendentives, arches of exposed sardinel brick, and polished stone columns. The high altar, which originally featured an extraordinary altarpiece depicting Saint George, was made of sculpted alabaster in Baroque style, with spiral-shaped columns and an abundance of decorative reliefs.
