mNACTEC

thumb|upright The National Museum of Science and Industry of Catalonia () known by its acronym (mNACTEC) is one of the three national museums of Catalonia, located in Terrassa, near Barcelona. Its mission is to showcase and promote an understanding of scientific, technical and industrial culture, and furthermore to preserve, study and present the establishment and evolution of scientific and technical advances in Catalonia, their industrial application, and above all their social implications and impact. The museum is an anchor point on the European Route of Industrial Heritage.

==Building== thumb|upright|The weaving shed columns with the roof and line-shafting. The museum is housed in the iconic Vapor Aymerich, Amat i Jover in Terrassa near Barcelona. It was designed by the Catalan architect Lluís Muncunill for Messrs Aymerich, Amat i Jover in 1909. He solved the problem of roofing the immense weaving shed with row upon row of 161 shell-shaped half arches, each with gently curving windows: this served the same function as the saw-toothed north lights in a Lancashire weaving shed. The columns broke up the usable space of the factory so had to be carefully placed around the looms. The columns functioned as rain water drainage, and held the line shafting that transmitted power from the stationary steam engine to the looms. The engine house and other parts of the building feature the Catalan vault. The factory was severely affected by the flooding of 1963 () and it finally closed in 1978. It was bought by the state in 1983 and opened as a museum.