Knowing that the beauty of a sonnet partly comes from its contraintes, Mauricio Pezo (Renaico, 1973) and Sofía von Ellrichshausen (Bariloche, 1976) have steered their practice, based in the city of Concepción, with rigid frames out of which a profoundly lyrical architecture comes forth: works where pure geometries and matrix orders help them make a link between artistic image and spatial experience. Strictly baptized with four-letter names, Arquitectura Viva presents a selection of them – from a large university facility and two houses to a group of pavilions, in Chile and abroad – that shows how life can spontaneously arise from fixations.