thumb|University of Michigan (1855) by [[Jasper Francis Cropsey, depicting a view of The Diag in 1847 from east to west.<br />From left to right: the Engineering Building (1839–1922), the President’s House (1839), the Medical Building (1848–1914), South College (1849–1950), and Mason Hall (1841–1950)]]
The Diag ( ) is the oldest area of the University of Michigan campus in Ann Arbor, Michigan. Originally referred to as the Diagonal Green, the Diag acquires its name from the multitude of sidewalks that traverse or border it in diagonal directions. Numerous historic buildings of the university are positioned in proximity to the Diag.
History
In April 2008, spring commencement ceremonies were held at The Diag, as Michigan Stadium was undergoing construction. In April 2024, The Diag was one of the sites for the nationwide pro-Palestinian encampment.
Current buildings
{| class="wikitable sortable plainrowheaders"
! scope="col" style="width:90px" |Name
! scope="col" style="width:150px" class="unsortable"|Photograph
! scope="col" style="width:40px" |Year Built
! scope="col" style="width:80px" |Architect
! scope="col" class="unsortable"|Description
|-
! scope="row"|President’s House (Southwest Professors' House)
|150px
|align="center" |1839
|align="center"|Isaac Thompson and Harpin Lum (supervisors)
|One of four faculty residences which were the first structures built for the university on the campus.
|-
! scope="row"|Tappan Hall
|150px
|align="center" |1885–1956
|align="center"|Gordon W. Lloyd
|Constructed in 1885, occupied in 1886. In 1926, the building name was changed from Engineering Shops to West Engineering Annex. Removed in 1956 to allow for the construction of the Undergraduate Library.
|-
! scope="row"|West Physics Building