This architectural complex is located on the right side of the Llobregat river, next to the Bauma bridge, very close to the BP-1121 road. The Bauma factory is a construction made up of two buildings, that of Roca i Llubià, the two owners, and the new factory. Both are located on the banks of the river, arranged side by side, following the course of the river, and separated by the Torre de l’Amo. The first, the older one, built to carry out the finishing and shipping processes, has a single storey and is characterised by a row of twenty-three openings in segmental arches. The second, which was used for spinning and weaving, as well as the yarn store, the office and the turbine room, has four storeys and a gable roof. In both constructions, an almost identical facing wall is used, thus giving them a unified character. The Torre de l’Amo is a construction attached to the walls of the factory on the west corner, forming a main façade facing Monistrol and another one facing the road. The ground plan of the building is made up of two polygonal bodies, a square one equivalent to the porch and a rectangular one, where a lookout tower and the building's outbuildings are located. Access to the building is from a staircase located after the porch, which has three ovoid arches supported by two pillars with vegetal capitals and a three-slope roof. The tower has a square floor plan and a lookout tower crowned with battlements. The unifying element of both bodies is the gable roof, covered with green and reddish tiles. The walls are of exposed brickwork, and the filled spaces and openings form vertical strips that fit in perfectly with the general composition of the factory buildings. The facing has several balconies with arches that vary from segmental arches to convex arches and lintel arches. The plinths, imposts, arches and tympanums are covered with glazed tiles and ceramic friezes that form multicoloured geometric and vegetal compositions. The Bauma factory was founded in the mid-19th century when Narcís Roca and Francesc Llubià joined forces to create the Bauma textile colony. At first, the Bauma factory was known by the names of the two owners: Roca i Llubià, names that lasted until 1929, although they changed hands several times. The saga began with the Güell family, and later, in 1892, it passed into the hands of the Dalmau i Tolrà brothers, well-known in the textile world. And thirdly, in 1896, they were owned by Joan Vial i Solsona, coinciding with the period of maximum splendour of the factory and the colony. With this new owner, the company underwent significant growth and modernisation both as a factory and as a colony, as both parts underwent major extensions and improvements. Also from this period are the extraordinary and emblematic buildings of the Torre de l’Amo and the Church, built between 1905 and 1908. The Dalmau family kept the property until 1917, when it was taken over by the Parera i Vives brothers, and after 1920 it passed into the hands of Bartomeu Puiggros e Hijos de Bartomeu Puiggros. Finally, in 1930, it passed into the hands of Josep Balcells-Dolors Morató until 1963, when it closed its doors, to be acquired a few years later by the final owners: Nerpel S.A., who started up the factory again, restored important parts of the building, such as the Torre de l’Amo. It was in a state of disrepair and kept under the name of Balcells S.A. until 1990, when the company finally ceased to operate, a few years after the death of the new owner, Jaume Amor Ruiz, one of the last great textile entrepreneurs of the industrial era. Bauma is known as the oldest of the three large colonies in the municipality of Castellbell i el Vilar, followed by Colònia Burés and Colònia Borràs. To reach the factory you have to cross a bridge, owned by the factory, built in 1859, and several floods have made it necessary to rebuild it.