The Workers' Square of Macosa, a metallurgical company that operated between 1857 and 1994 in the Poblenou neighborhood, in the Sant Martí district, is located in a space in Diagonal Mar Park in front of Ramon Calsina Square and Ramon Turró and Selva de Mar streets.
The Macosa factory had, in some stages, more than 5,000 workers, whose struggles for social transformation and contribution to the labor movement in Catalonia have been recognized with this name in the public space.