Tour of Ostia, characterized by multi-storied residential buildings and widespread use of brick-faced concrete. The city's public face features the Forum, Capitolium, Theater, and Piazzale delle Corporazioni with its black-and-white mosaic shipping company advertisements. The Insula of Diana, a four-floor brick apartment building, and warehouses like the Horrea Epagathiana highlight the Ostian appreciation of the aesthetic qualities of exposed brick facing.