Granting of the city title to Terrassa Historical milestone · Terrassa, Vallès Occidental, Barcelona Image of Terrassa, not of the place itself. Alfonso XII granted Terrassa the title of city in 1877, at the height of the take-off of its wool industry. The steam mills, the warehouses and the manufacturers' houses reordered the urban fabric and left the group of modernist industrial architecture that is walked today. 1877 Photo: Pere López (CC BY-SA 4.0) What to see and do in Terrassa