The complex is centred around three courtyards, each surrounded by two storeys of rooms that have served as shops or storage. Each courtyard had a flat wooden roof supported by brick columns. The middle courtyard housed an altar for the protecting deity of the horrea and a fountain. In front of the building was a travertine portico on the Vicus Tuscus.
In the middle ages houses were built in the courtyards, changing the appearance of the area.
(Text in German — one good photograph)