House of the sun is a project designed by Fran Silvestre Arquitectos. We have always been fascinated by the work of Andreu Alfaro “The door of the Universe” made in 1983. A circle rotated and suspended over a square. For some years it was located at the door of our studio, and it was surprising its ability to make us think, place ourselves at the base when the day ended and consider that we were indeed facing a threshold that opened the door to infinite space.