An outdoor triclinium from Casa Dell'efebo. Notice that the benches (where the diners were lying) is painted. The house have another, indoor, triclinium as well but that was unfortunately covered in plastic the last time I was there.
Next up is the triclinium, the official dining room in a upper class house from this period. The name comes from the characteristic sofa situated in the room which is, as the name suggests, three parted. This is normally one of the more elaborately decorated rooms in the house and would if possibly be placed with a clear view of the garden (hortus). The very riches even had two triclinia, of facing north for the summer, one facing south for the winter.