The Hipódromo de la Zarzuela is a race course on the outskirts of Madrid, Spain.
The architects were Carlos Arniches Moltó [es] and Martín Domínguez Esteban, who had been collaborating since the 1920s.
For this project, they were joined by the engineer Eduardo Torroja, a pioneer in the design of concrete shell structures.
The new race course was in an advanced state in 1936, but damage caused by the Spanish Civil War delayed completion.
[1] As well as listing the stands and other structures for protection, the citation refers to the paddock and pelouse (infield) as being of interest.