Overhead view of the interior of the Ammaedara (Haïdra) trough monument. The drawing is in landscape format. It is organized within a frame drawn in ink. Traces of watercolor and inscriptions are visible in the margins.
The drawing shows the internal organization of the building, seen from an embrasure. The building opens onto a vestibule. This leads to a square room, ending in an apse housing a statue. Its walls are pierced by several niches. The room is covered by cross vaults. The vestibule also leads to an upper level, accessible by stairs. Several figures are represented in the building. The functions of the building are difficult to determine exactly. It could be a place for distributing food or collecting taxes in kind.