Black-and-white photographic postcard of the interior of the Hauptsynagoge (Main Synagogue) in Mainz. The postcard is accompanied by a handwritten note from Rabbi William A. Rosenthall stating: "The beginning of the collection. Grandmother Rosenthall. Lost & found!"
![[Unidentified synagogue]](https://iiif.library.cofc.edu/iiif/2/36447/full/200,/0/default.jpg)
