Each room in the main part of the Temple was built as a re-creation of some important period of architectural history. The artistic motif of each room is based on careful study, which allows the building to serve not only as a meeting place for the Scottish Rite, but also as a reminder of the artistic styles and beliefs of various peoples in history.
The Atrium serves as the great gathering hall of the Temple and was built in the style of the ancient Roman Empire. The room is 190 feet long and 52 feet wide. The floor is of Tennessee marble and the marble steps at each end of the hall and the wainscoting come from Vermont. The dark marble used for accent is Italian Verde. The Tetragrammatons accenting the floor enclose the Hebrew name of Deity. A large stained glass skylight creates a ceiling centerpiece that bathes the room with natural light.