CASA the house of Monsaras

Facing the vast expanse of the Alqueva Lake, this house needs a center, a protected courtyard that embraces the water. A cast concrete dome, shaped from the terrain, covers the entire social space, which is the living heart of the house. An inverted dome intersects it, creating an opening that illuminates the space and shapes its precise geometry and boundaries. The bedrooms open onto a circular inner courtyard. Within the broad natural landscape, the scale of the house is measured only by its inner courtyard and the externalized inverted dome. These are the only visible elements, painted in brilliant white. The project, by Aires Mateus, is a meditation on shelter and prospect in an extreme landscape. The dome form references both ancient Mediterranean architecture and the vernacular traditions of the Alentejo region, where whitewashed walls and curved roofs reflect the intense sunlight and wide-open skies. The house does not impose itself on the landscape but rather emerges from it, with the concrete dome appearing as though it were carved from the earth. The circular courtyard becomes the focal point of domestic life, framing views of the lake and sky while providing a protected outdoor room. The inverted dome opening brings natural light deep into the interior, creating a play of light and shadow that changes throughout the day. The result is a dwelling that is at once primordial and contemporary, deeply rooted in its place while achieving a timeless architectural clarity.