In contrast to the curved surface on the river side, the southwest façade is an uncompromisingly rectangular glass-clad curtain wall. It faces a large square public space that opens in the direction of the Île de la Cité and Notre Dame.
Unlike the curved surface on the river side, the southwest façade consists of a rigidly rectangular glass-clad curtain wall. This facade overlooks a vast open square that aligns with the Île de la Cité and Notre Dame.