Ferlandina 20 is a typical 1860's working class apartments building located north of the Barcelona Raval district. In the 60's and 70's, it was known as the Caballero Boxing Gym, time from which remain 64 murals of famous boxers on the walls.The space is organized by free standing furniture. The last remodelling has consisted in organizing an area for children, with a compact multifunctional furniture inserted into the space as an "H" with four sliding doors creating a continuous circulation when opened and organizing the different activities around it when closed: dressing room for parents, bath area, sleeping area and play and reading area. Given the small size of the room, the mezzanines should not be continuous surfaces.