in the last few decades, besides these two urban areas, new urban agglomerations have emerged, such as "courela do foguete", "fonte perra", "olival covo", "quinta do património" and "real forte", as well as "terraços da ponte". the latter area replaced the old and much degraded "quinta do mocho" zone, which was the centre an african emigrant community, from the former portuguese colonies, that returned to portugal after the carnation revolution in 1974, and whom lived in poor conditions, over the past three decades.