The House of the Triple Windows was built during the reign of Antoninus Pius (opus latericium). The narrow north facade is on the Cardo degli Aurighi. The long south-east facade is on the western stretch of the Decumanus Maximus. Off both streets open shops. The long south-west facade was a secondary road that has been called Via delle Trifore, after the triple windows in this facade, both on the ground and first floor.
Along Via delle Trifore is a long row of back rooms, receiving light from the many windows. Several shops are connected with these rooms. In the north-east part of the building are two clusters of back rooms with connecting doors. Each cluster was accessible from one door on Via delle Trifore and from one shop. Between these clusters are two external staircases. The back rooms in the south-west part were also accessible from Via delle Trifore, and in this part a further external staircase is found. Rather curious is the facade of the back room to the south-west of room A: it protrudes from the rest of the facade, it is slightly curved, and has a wide doorway. Was this a main office? Rooms were added later to the west of these rooms (Edificio III,III,3).
Plan of the building. After SO I.In two rooms along Via delle Trifore are some extensive remains of paintings. On the north wall of room A red bands and white lines create panels on a yellow background. There are connecting garlands. One of the panels contains a green rectangle. This panel rests on a wide, white band with two red lines. The painting continues on the springing of the ceiling. On the east wall of room B, next to a door, red and yellow bands and red lines create panels and rectangles on a white background. In the centre of the panels are two objects, not identified. This painting has been called an early example of the so-called Linear Style or Catacomb Style. The rectangles are no longer regarded as architectural elements. Both paintings have been dated to the later second century AD. The quality of the paintings suggests that at least these back rooms were not intended for commercial use, but habitations.
