File 1854-1868 (Original building) Folder D13-255 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Observatory
File 1856-1880 (One story, with additions) Folder D13-173 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Economics Building
File 1863 - 1872 and undatable Folder D2-120 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Views » Central Campus » State Street side of campus
File 1863-1893 (Original building) 2 folders Folder D13-193-194 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Haven Hall (built 1863)
File 1865 Print Folder D2-120.5 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Views » Central Campus » State Street side of campus
File 1868-1908 (With west wing added) 2 folders Folder D13-256-257 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Observatory
File 1872 - 1893 Folder D2-121 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Views » Central Campus » State Street side of campus
File 1877-1891 Folder D13-165 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Dental Building (on North University Avenue), 1891-1908
File 1879-1891 (original building with east wing) Folder D13-182 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Engineering Building (built 1840)
File 1880-1901 (Two stories) Folder D13-174 Online In: University of Michigan Photographs Vertical File, 1850s-1980s » History and Description » Campus Buildings » Economics Building