RE: Getting Started - Initial Thoughts on 3D Printing
(This passage does not describe the double-herm in question, but a separate herm bust now lost. Only the shaft with the inscription survives.)
We discuss the same problem in that thread.
QuoteIn ancient art, double herms were a common statue type. While in Greece they were displayed in public rooms, in the Roman empire they were shown in private spaces.
-Wikipedia
QuoteDouble herms were a creation of the imperial period and this example is one of four double herms found in the corners of the peristyle garden of the villa at Fondo Bottaro, one each corner.
That seems to me the best explanation. The floor-plan of these ancient villas was so thoroughly different to the way we do things now where everything gets shoved against wall. Their walls had frescoes, not televisions. Furniture and objects would be arranged in the center of the room. The perimeter of the room was for walking--a place where slaves would be on hand and free to move about, but of the way.
The "corners" of a peristyle courtyard would still be away from the walls some considerable distance, as a colonnade and covered walkway would surround the garden.
Everyone sitting down side by side and facing one wall is an artefact of the fireplace, and then the television. A Roman villa would use braziers, not a hearth.