44 stories tall, it survived the 1985 event almost undamaged. It was constructed with two hundred piles extending down over into the stable earth stratum. Localization of the damage Mexico City is divided into boroughs. Eighty percent of the earthquake damage was confined to four of them: Venustiano Carranza, Cuauhtémoc, Benito Juárez and Gustavo A. Madero. The damage area corresponds to the western part of the lake zone within of the Alameda Central. Nearly all the buildings that collapsed were located in this lake zone that extended from Tlatelolco in the north to Viaducto Miguel Alemán in the south, Chapultepec Park in the west and to a short distance east of the Zócalo or main plaza. Building damage in the city Cuauhtémoc, which includes the historic downtown, suffered the most damage. In this particular area, 258 buildings completely crumbled, 143 partially collapsed and 181 were seriously damaged. The next seriously affected area was Venustiano Carranza where 83 buildings collapsed, 128 partially collapsed and 2,000 structures were seriously damaged. Damage was localized to the center parts of the city, leaving much of the residential outer rim unscathed, but the damage in the affected area was extensive. Over 720,000 tons of debris was removed during the first six weeks after the event. The Metropolitan Commission for Emergencies of the Federal District reported 2,831 buildings damaged for the entire city: 31% or 880 were completely ruined, 13% were reinhabitable with major repairs and the rest, totaling 1581, were recoverable with minor repairs. This translates to more than 30,000 housing units completely destroyed and another 68,000 units damaged. Hospital Juárez One of the most visible government institutions to fall in the event was the tower of Hospital Juárez, one of the oldest hospital institutions in Mexico. It was founded in 1847, converting the old convent of San Pablo to treat wounded soldiers from the Mexican–American War. It originally was called San Pablo Hospital but its name was changed to Juárez Hospital in 1872. The "Torre de Hospitalización" was built in 1970 with the main building being twelve stories tall. It had two wings, one facing north and the other south, with an inpatient capacity of 536 beds. At the top was a helipad. It was also surrounded by a number of other buildings belonging to the hospital complex such as a blood bank, teaching facilities, offices as well as the original convent. At the