Dome

View within the observatory (at the 44th floor); It was the city's tallest building from 1956, when it was built, until the 1984 completion of the Torre Ejecutiva Pemex. The project was designed and executed by Dr Leonardo Zeevaert and his brother Adolfo, Mexican civil engineers born in Veracruz. Nathan M. Newmark was the main consultant. Its design consists of a steel frame construction and deep-seated pylons, which were necessary given Mexico City's frequent earthquakes and muddy soil composition. The tower gained notoriety when it withstood the 1957 earthquake, thanks to its outstanding design and strength. It also withstood the September 19, 1985 earthquake without problems. Source: Wikipedia; http://en.wikipedia.org/wiki/Main_Page (accessed 6/22/2009)