The great migration of the 1950s and 1960s Historical milestone · Santa Coloma de Gramenet, Barcelonès, Barcelona Image of Santa Coloma de Gramenet, not of the place itself. The municipality went from some fifteen thousand inhabitants in the middle of the twentieth century to more than one hundred thousand in 1970, with the massive arrival of families from the south of the peninsula. Entire neighbourhoods were born of self-building and of neighbourhood struggle for services. 1950-1975 Photo: Pere López (CC BY-SA 3.0) What to see and do in Santa Coloma de Gramenet