:.The building that houses the Museu de la Ciència i de la Tècnica de Catalunya, the Aymerich, Amat and Jover mill, is the finest example of Art Nouveau industrial architecture in the country. Designed by the architect Lluís Muncunill i Parellada (Sant Vicenç de Fals, 1868 - Terrassa, 1931), work began on building the factory in the Rambla d'Ègara in 1907 and it was opened barely a year later.
The mill, (known in Catalan as a Vapor or Steam after the steam engine used to drive it), contained all the industrial processes to transform wool, from the moment when the raw wool entered the building to when it left as finished cloth.
The Museu de la Ciència i de la Tècnica de Catalunya has 22.200 m2 of surface area, of which 11.000 m2 correspond to the original rectangular plan shed of the Aymerich, Amat and Jover mill. This great room, in which the permanent exhibitions Power, The Textile Mill, Homo Faber and Transport can be found today, is covered by a special saw-tooth roof. The usual straight forms of these roofs was reinterpreted by the architect Muncunill into 161 bell-shaped Catalan vaults, supported on 300 cast-iron columns. These also function as rainwater pipes and support for the line shafting, the apparatus that transmitted the force from the steam engine to each of the machines in the factory.
