A cubiculum was a private room in a domus, an ancient Roman house occupied by a high-status family. It usually led directly from the atrium, but in later periods it was sometimes adjacent to the peristyle.

What is a Cubiculum used for?

The cubiculum was used for quiet or secret meetings and could have been used as a library. It was also a preferred venue for murder and suicide. A room used only for sleeping was not classed as a cubiculum.

What is the meaning of a Cubiculum?

: a small room provided in catacombs and constituting a family vault.