Gain an insider’s understanding of the challenges in building two avant-garde landmarks by touring them with a guide. Perched along the waterfront, La Cosquer Mediterranée was designed to embody Marseille’s deep bond with the sea. Instantly recognized for its prominent cantilevered overhang, this three-level public space also features a conference center with portholes beneath the sea. As you will discover, that lower floor presented all sorts of unusual circumstances that pushed the boundaries of architecture. The building faces MUCEM, a national museum devoted to Mediterranean civilizations. Its audacious design includes elements such as tree-like columns, a lacy façade that resembles a fishnet and a slender footbridge that connects it to the towering ramparts of Fort St. Jean. The square-within-a-square shape of MUCEM is classical in one sense but radically different because of the building materials. The concrete filigree that shields much of the structure is particularly stunning.