The term ROOM ROMAN is a combination of two words, ATRIUM and ROOM. An ATRIUM is an open-air courtyard or central hall in a building, typically with a glass roof. The term is derived from the Latin word for 'entry hall'. In ancient Rome, the ATRIUM was the main ROOM of a house, where guests were received and business was conducted. In modern architecture, the ATRIUM is often used as a gathering space or lobby. The term ROOM ROMAN is used to describe a ROOM that has been designed in the style of an ancient Roman ATRIUM.