This CDV of an Chicago church was taken by photographer, Brands Art Gallery between 1864 and 1866. We know this by the revenue stamp on the back on the photograph. During the Civil War a tax was levied on photographs beginning in August 1864 and continued through August 1866. The photographer was required to cancel the stamp by initialing and dating the stamp which only actually occurred on about 25% of the stamps. This particular stamp does have the photographer's initials and a date, unforgettably I cannot read either! A quick search did not turn up anything on Brands Art Gallery.