This office complex is located in the Avenida da Boavista, the biggest straight line avenue in Portugal that extends from "Casa da Música" till the Sea in West. This complex opens a large square between the two buildings, one horizontal and the other vertical. The square is occupied by a big sculpture by the Porto architect/sculptor Nadir de Afonso. The buildings were drawn with very simple shapes, following the influences of Mies and the Chicago buildings. The main interest about the building is its façade. Its skin is composed out of a single module that wraps all the volumes. That module was studied so it could fit on 2 different ways creating a glass façade and an opaque façade.