Fire Insurance Maps Online (FIMo)
These high-resolution color maps of Murfreesboro (1887-1924) and other Tennessee towns and cities provide a wealth of information, such as building outline, size and shape, construction materials, height, building use, windows and doors, street and sidewalk widths, boundaries, house numbers, and more.
Digital Sanborn Maps, 1867-1970
These detailed black and white maps of Columbia, Mount Pleasant, and over 100 other Tennessee towns and cities provide a wealth of information, such as building outline, size and shape, construction materials, height, building use, windows and doors, street and sidewalk widths, boundaries, house numbers, and more.
The National Map: Historical Topographic Map Collection (USGS): digital repository of USGS 1:250,000 scale and larger maps printed between 1884 and 2006.
Earth Explorer - limit your search to "Single Frame Records"
The video tutorial How to Find Free Historic Aerial Images provides step-by-step instructions for searching Earth Explorer for these images.
Landscapes Through the Lens: aerial photographs and historic environment