Architectural will is that of substraction, therefore it is decided to build a concrete circle the way a well is constructed.Architectural meaning, is that of a circle transuer send by a straight line that contains the hours acces, and also separates public space from private one.The complexity of the solution comes from the intersection of two volumes; the surrounding circle and the straight regularity; where the circle inserts it self with the exterior, thus preventing the appearance of a new constructive way, but more like the notion of a water tank.