The Evergreen Cemetery Gatehouse in Gettysburg

Confederate dead near the Dunker Church at Antietam (Sharpsburg), MD

The Confederate flag flying inside the battered Fort Sumter in Charleston Harbor, SC

Aspinwall Hall of the Fairfax Seminary, which was used as a Union hospital in Alexandria, VA

Ford's Theater in Washington, D.C.

The President's box at Ford's Theatre after the assassination of President Lincoln in Washington, D.C.

Ford's Theater draped with a mourning cloth and guards outside the entrance after the assassination of President Lincoln in Washington, D.C.

Federal squadron dressed with flags for the anniversary of Maj. Robert Anderson's surrender in 1861 seen from a parapet of Fort Sumter, Charleston Harbor, SC. This photo was taken on April 14, 1865.

The former office of Price Birch & Company, Dealers in Slaves on Duke Street in Alexandria, VA

A dead Confederate soldier in the Slaughter Pen in Gettysburg.

Federal soldier disemboweled by a shell in Gettysburg.

Fairfax Church, Fairfax, VA

Georgetown aqueduct from Virginia side of Potomac with Georgetown University in background

A photograph of the crowd during the dedication of the Gettysburg National Cemetery. It was during this event President Lincoln gave his Gettysburg Address.

Company F, 3d Regiment Massachusetts Heavy Artillery at Fort Stevens, Washington, D.C.

Ruins of houses in Fredericksburg, VA

Officers of 2d New York Heavy Artillery, at Fort C.F. Smith in Arlington, VA

Georgetown ferry-boat carrying wagons, and Aqueduct Bridge beyond, from rocks on Mason's Island (modern day Teddy Roosevelt Island)

General Ulysses Grant at his headquarters in Cold Harbor?

The Grand Review of the Army down Pennsylvania Avenue in Washington, D.C.