Lutheran Seminary cupola

On June 30, 1863, Brigadier General John Buford climbed to the Cupola of the Lutheran Seminary Building, where he saw the campfires of thousands of Confederate soldiers burning to the west.  Predicting a clash was imminent, this view helped him lay out his lines of defense to protect Gettysburg’s pivotal road network. The next morning, as the largest battle in the Western Hemisphere erupted, Buford again ascended to the Cupola to watch for vital Federal reinforcements.

Source: Guided Cupola Tour and Museum Admission | Destination Gettysburg

One of my favorite pieces because it looks truly 3 dimensional; note the shaded posts on the opposing side.