The Cultural Center of Spain in Buenos Aires (CCEB) is located on the 900 block. This block, however, is best known locally as the erstwhile site of the Torcuato di Tella Institute. Located on Florida Street during its heyday between 1963 and 1970, the institute was led at the time by former National Fine Arts Museum director Jorge Romero Brest, who steered the center as the leading Argentine venue for pop art, experimental theatre, and conceptual art, drawing artists such as León Ferrari, Gyula Kosice, Luis Felipe Noé, and Antonio Seguí. Romero Brest also promoted the center's famed Happenings, notably those of Marta Minujín, whose interactive displays and mazes helped make this block of Florida Street Buenos Aires' "mazana loca" (city block of madness).