Barrio de La Latina (Madrid) the vicinity of the San Francisco Racecourse - that continues from the Plaza de la Cebada up to the San Francisco el Grande Basilica. These limits are: to the north, Segovia street - a deep ravine formerly occupied by the San Pedro Stream which empties into the Manzanares River, to the south there is la Ronda and Puerta de Toledo, on the east there is Toledo street - bordering Rastro and the district of Lavapiés - and to the west, Bailen street. La Latina occupies much of the oldest section of Madrid, sometimes referred to as El Madrid de los
Allison Engine Testing Stands section. The most prominent features of the six open engine testing stands constructed in 1942 are the six reinforced concrete walls which separated the testing stands and provided a degree of protection against excessive noise or a propeller malfunction. Stands 1 to 4, numbered from the north, have been constructed on a raised concrete platform above ground level. Parts of its flooring have been raised higher above the general level of the platform. They indicate the positions where each engine stand and its respective control cabin would have stood. Most of the remaining evidence of the purpose and working life