The Bentley Historical Library will close at 1:30 p.m. August 23 and will reopen at 9:00 a.m. August 24

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 on U-M’s campus. In 2005, the Detroit Observatory became a division of the Bentley Historical Library.

Having undergone a full restoration in 1998, the building stands essentially as it was in 1854.

Please email Karen Wight at with questions or for more information.


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