The Historic Structures Report on the Blount Mansion in Knoxville, Tennessee focused on the architectural development of this National Historic Landmark. The Mansion was constructed in ca. 1792 as the residence for the governor of the Southwest Territories, and continued as the governor’s residence after Tennessee’s statehood in 1796. The original one-and-one-half story Blount Mansion was not recognizable within twenty-five years of its construction. By the 1810s, the original floor plan and orientation of the 1792 house had been changed and the original construction hidden within a two-story house with east and west wings. Changes did not stop here; alterations continued for the next century-and-a-half. The color-coded plan below records the chronological order of the Mansion’s architectural development. The overlay of the many periods may appear to be a scrambled assemblage of elements, but physical analysis of the building documented evidence for each alteration. Evidence was found in several forms: historic photographs; the stratigraphy of painted finishes; distinct decorative finish treatments; breaks in the sequence of finishes; documented developments in the technology of manufactured elements, such as nails and hardware; and distinct profiles of architectural moldings, doors, windows and mantles. The sequence of historic finishes provided a chronology of unique layers associated with each period of construction or alteration and allowed for the tracking of new features introduced at each period and the reuse of older elements in newer construction.