During this time the downtown district was consolidated into a commercial, financial and administrative center, with the establishment of various portals and locales around Ahumada Street and a Civic District in the immediate surroundings of the Palace of La Moneda. The latter project involved the construction of various modernist buildings for the establishment of the offices of ministries and other public services, as well as commencing the construction of medium-rise buildings. On the other hand, the traditional inhabitants of the center began to migrate out of the city to more rural areas like Providencia and Ñuñoa, which hosted the oligarchy and the European immigrant professionals, and San Miguel for middle-class families. Furthermore, in the periphery villas were built various partners from various organizations of the time. Modernity expanded in the city, with the appearance of the first theaters, the extension of the telephone network and the opening of the Airport Los Cerrillos in 1928, among other advances.