When a couple approached São Paulo–based Fernanda Marques Arquitetos Associados to redesign their duplex apartment, they were seeking a design versatile and minimalist enough to accommodate their ever-growing art collection and have it harmoniously blend into the interior concept. One of the most striking features in the 5,135-square-feet home is the glass-walled swimming pool. Sited in the exterior garden, it goes across the front and center of the living room to create an aquarium-like wall.