Tablinum

In Roman architecture, a tablinum (or tabulinum, from tabula, board, picture) was a room in a domus (house) generally situated on one side of the atrium and opposite to the entrance; it opened in the rear onto the peristyle, with either a large window or only an anteroom or curtain. The walls may be richly decorated with fresco pictures, and often busts of the family were arranged on pedestals on the two sides of the room.