The Old Slaughterhouse of Esparreguera is one of Domènech Mansana's works that are conceived on the border between Catalan Art Nouveau aesthetics and Noucentisme. Some construction details and the use of exposed brick framing openings still evoke the modernist sources, but the lack of added decoration and the basilica plan and section of the building are already of a noucentist style. In this way, the property, which occupies an area of 300 m2, consists of three naves separated by columns, the central one higher than the side ones, which are symmetrical. The central nave is covered by a gable roof, while the sides are covered with single-sided roofs. In the main nave, the main façade is arranged with respect to a central axis, where the access door is located, in a pointed arch profiled in brick and green glazed ceramic buttons on the imposts. In the gable there is a large window which is also pointed and is divided into three parts by two mullions. On each front of the side aisles there is a large window with a wavy arch, a form that is repeated in the windows of the side façades. The building also receives natural light from the line of windows that open at the top of the sides of the central nave, which repeat the wavy shape of the lintels and are tripartite with single mullions. The cornices are decorated with lace placed under the eaves, and at the ends of this there are stepped ornaments in the form of corbels.

The slaughterhouse stopped functioning as such in 1985. Then it was used as a cultural centre and hosted exhibitions, as well as the castellers, the giants and the devils of Esparreguera. It is Esparreguera's Federation of Entities of Popular and Traditional Catalan Culture, users of this equipment, that bring together the different groups.

Josep Domènech Mansana was the son of the architect Josep Domènech i Estapà. In 1917 he was appointed architect of the Ministry of Public Instruction, from where he built schools in Badalona, Argentona, Igualada, Esparreguera, etc. He was also the municipal architect of Esparreguera and Sant Celoni, where he designed the Casa de la Vila, the Athenaeum and the Slaughterhouse, and a professor at the School of Arts and Artistic Crafts in Barcelona.

Basilica-style building with three naves. On the façade, a remarkable portal opens with an exposed brick arch and decorated with tiles, and above it there is a large semi-circular window. On either side of the main door there are two windows with an undulating line at the top, as are the windows opening at the top of the sides of the nave. The roof of the central nave has two slopes and those of the side naves have one slope. The eaves is decorated with a toothed moulding.

This slaughterhouse replaced the one in Plaça de Santa Anna, where the Mare de Déu de la Muntanya school is today. It stopped functioning as such in the 1980s. Josep Domènech i Mansana, an architect born in 1910, was the son of Josep Domènech i Estapà. In 1917 he was appointed architect of the Ministry of Public Instruction, from where he built schools in Badalona, Argentona, Igualada, Esparreguera, etc. Other of his works in Barcelona are the El Águila warehouses, the Caixa Mútua Popular de Barcelona and the Santa Tereseta church. He was the municipal architect of Sant Celoni, where he built the town house, the Athenaeum and the slaughterhouse. He published "The house" (1923), "ABC of the owner" (1925) and "The urban estate" (1928). He was a professor at the School of Arts and Artistic Crafts in Barcelona.