Photo of the General Post Office building in Washington, D.C., probably taken in July 1850. The building appears partially draped in dark mourning bunting to memorialize President Zachary Taylor who had died on July 9, 1850. This makes it probably the earliest extant photo showing memorialization of a recently deceased US President. Taken by the Langenheim brothers and originally published as a salted paper print.
Early photo of Culp's Hill taken shortly after the Battle of Gettysburg by the Tyson brothers possibly in August 1863.
"Emigrant Train, Strawberry Valley, going East." Photo of settlers and their covered wagons traveling through Strawberry Valley, California, 1865. An inscription on a rock at right says "J. T. Lee" followed by more partially visible words/letters/symbols. By photography firm Lawrence and Houseworth and originally published as a stereoview. A rare copy of the stereoview in the collection of the New York Public Library has a copyright date of 1865 on it.
View probably showing an old mill or factory building taken somewhere in the Northeastern United States, c. 1860. Originally published as a stereoview.
View of houses and businesses in Sioux City, Iowa, c. 1860s. Taken by photographer Byron Gurnsey and originally published as a stereoview.
View of a road near Flying Hills, Pennsylvania, c. 1870s. Taken by photographer James Cremer and originally published as a stereoview. What is probably Cremer's photography wagon is visible on the left hand side of the road. A bucket is visible next to the right rear wheel.
Portrait of a man posing at the door of the Weeping Willow schoolhouse in Chester County, Pennsylvania, c. 1860. The small building looks like it is probably a one-room schoolhouse. Attributed to Amateur Photographic Exchange Club member Joseph Miller Wilson and originally published as a stereoview.
Portrait of two women posing in a horse-drawn carriage on the grounds of Oakland Hall in Montgomery County, Pennsylvania, c. 1860s. Probably taken by an amateur photographer and originally published as a stereoview.
View of the War Department building in Washington, D.C., c. 1860s. Originally published as a stereoview by D. Appleton & Company.
View of a large house or mill possibly along Rock Creek in Washington, D.C., c. 1855-1860. Attributed to Titian Ramsay Peale. An outbuilding is prominently visible at center left.
View of a small wood and stone dam holding back a stream on a hillside possibly along Rock Creek (in the foreground) in Washington, D.C., c. 1855-1860. Attributed to Titian Ramsay Peale.
View of Peirce Mill (right) and Peirce Barn (building in background) along Rock Creek in Washington, D.C., September 26, 1855. The building between the mill and barn appears to be another barn which is no longer standing today. Attributed to Titian Ramsay Peale.
View of a billiard room building on an unidentified plantation in South Carolina, 1860. Taken by Amateur Photographic Exchange Club member Edward Cottenet and originally published as a stereoview. The only other stereoview taken by Cottenet that I can find online is one that features another large tree with other buildings behind it that was probably taken on the same plantation.
"On the old fortification at Valley Forge." View of a section of Revolutionary War-era fortifications at Valley Forge, Pennsylvania, c. 1862. Taken by Amateur Photographic Exchange Club member Samuel Fisher Corlies. Originally published as a stereoview. I think that the trees look to bare for this to have been taken in May as the Library of Congress site states so probably the May date on the card only pertains to the printing date.
View of a unidentified shuttered building in a forested area probably somewhere in the United States, c. 1870-1890. The building was possibly once a two-room schoolhouse considering what looks like two doors at the front of the building. Originally published as a stereoview.
Self-portrait of photographer John Moran posing behind a tree, c. 1863. Another unidentified man is posing in the background at right. Originally published as a stereoview.
Portrait of a group posing in front of the Georgetown University Astronomical Observatory in Washington, D.C., c. 1855-1860. What looks like a Jesuit priest wearing a straw top hat is posing at left. This is probably the earliest surviving photo of the observatory. Attributed to Titian Ramsay Peale.
View of a stretch of the Chesapeake and Ohio Canal near Little Falls on the Potomac River close to the Maryland/Washington, D.C., border line, c. 1855-1860. Attributed to Titian Ramsay Peale.
