Where can I find a timeline of the Duke Chapel’s construction?
This isn’t very detailed, but on page 35 of The Architecture of Duke University it says that the Chapel was planned in 1923, the cornerstone laid 10/22/1930, was first used for a commencement in 1932, and was formerly dedicated on 6/2/1935. For more detail, if you search the library catalog using the Subject Heading Duke Chapel (Durham NC) you’ll find a number of detailed sources in the library and University Archives, and some of these might help if you need something more day-to-day. There’s also the Subject Heading Duke University–Buildings and, more generally, any Subject Heading beginning with Duke University might prove useful (narrow this down using the facets in the left-hand column of the catalog).