With the opening of this building in the lakeside Swiss city of Lausanne, Plateforme 10, a $262 million purpose-built museum district, is now complete. Located on disused railroad land, next to the city’s main station, it provides new homes for three institutions: the Musée Cantonal des Beaux-Arts (fine-arts museum, or MCBA), the Musée Cantonal de Design et d’Arts Appliqués Contemporains (contemporary design and decorative-arts museum, or MuDAC), and Photo Élysée (photography museum). While the MCBA moved into premises by Barcelona-based architects Barozzi Veiga two years ago, MuDAC and Photo Élysée took possession of a shared $107 million, 155,000-square-foot building by Lisbon-based office Aires Mateus in June. Master-planned by Barozzi Veiga, the district takes the form of a long, narrow esplanade bounded on one side by the MCBA, along the tracks, and on the other by an arched retaining wall topped by apartment buildings, with the esplanade closed at its head by the Aires Mateus building (at the opposite end from the station).