ECLAC headquarters, Brutalist administrative building in Vitacura, Chile.
ECLAC headquarters is a building with distinctive exposed concrete architecture featuring 28 supporting pillars on the main floor that create an open spatial design. The complex includes water fountains, landscaped gardens, and outdoor areas organized around functional zones.
The building opened in 1966 with a ceremony attended by Chilean President Eduardo Frei Montalva and United Nations Secretary-General U Thant. This event marked a significant moment for regional cooperation and the establishment of an international institution in Chile.
The building's name comes from the UN Economic Commission for Latin America and the Caribbean, which has its seat here. The complex was conceived together with the Parque de las Américas, a green corridor along the Mapocho River, so the grounds and the building are read as one project.
The building stands on a 4-hectare site on the south bank of the Mapocho River in Vitacura, reached from the Parque de las Américas green corridor. The main volume is raised on four pyramidal pillars per side, freeing the ground level, where concrete slopes with exposed boulders step down toward the river.
The square floor plate measures 95.66 metres on each side, suspended from four pyramidal pillars per side that support a main beam from which the second-level slab hangs. Inside the ring sit two volumes: the central vertical circulation core and the spiral shell of the General Assembly hall.
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