The Usera healthcare center belongs to a trilogy of clinics along with those of Villaverde and San Blas. These three buildings form part of a process we call 3x1. The origin goes back to an unusual contest that called for the construction of two identical buildings (same client, same functional program and budget) in two separate locations in madrid (Usera and San Blas) in plots whose common characteristic was their lack of relevance. The answer to these initial conditions was the idea or premise of "misplaced building". In the case of the cms Usera, a concrete shell is covered with a golden skin of aluminum mesh. On the inside, the space becomes more horizontal and abstract due to the use of white ceramic tiles on the patios. The health center program is developed extensively in a single floor. The different rooms of the program are organized on a loose irregular orthogonal grid, where thirteen patios are arranged in a staggered pattern between the public and private rooms along three parallel (non)-corridors. In opposition to this system of atomized patios, the hermetic facade is conceived as a continuous and blind. The absence of holes in vertical planes of the outer skin makes the relationship between the interior and the exterior of the building to occur vertically, almost overhead. The glass walls do not define courtyards but holes in the front horizontal outer shell of the building and create a vertical relationship that generates an isotropic interior space.