The Bentley Historical Library is open by appointment only for U-M faculty, students, and staff. Please see our full announcement here.

Detroit Observatory

bhl_hs2510_4074_2853_full__0_nativeThe Detroit Observatory was the first observatory built in the state of Michigan and is the second-oldest building still standing on UM’s campus. In 2005, the Detroit Observatory became a division of the Bentley Historical Library.

The Observatory is currently closed for renovations that will add square footage, as well as on-site improvements including increased accessibility and greater connectivity.

No programming — including viewing nights and open houses — is scheduled right now. Stay tuned!

Please email Gary Krenz at with questions or for more information.


1398 E. Ann Street (at the corner of Ann and Observatory Streets)
Ann Arbor, MI 48109-2051