Constructed of Bedford limestone with gray granite trim, the main lobby is finished in marble; other rooms have their original wool carpet.

The lobby contains a 38-foot mural titled “The Origins of Freemasonry”, which was created in 1941 by African American artist Jessie Housley Holliman.

Dedicated by Senator Harry S. Truman, it is the only surviving mural by the noted artist in a St. Louis public building.

The ground and first floors and the first-floor mezzanine have areas where the general public is admitted only on days when a meeting is held, which is currently 10 per month.

Fifth and sixth floors were designed to house three of the York Rite organizations, which are known as the Chapter, Council, and the Commandery.