tablinum

In Roman domestic architecture,  a room situated on one side of the atrium, opposite the entrance, and opening in the rear onto the peristyle. The tablinum functioned as a office and reception room for the head of the family. Web resource here.

Tablinum House of the MenanderTablinum in the House of Menander, Pompeii. Before 79 CE. Photo: Carole Raddato.