Focus on Gettysburg Cyclorama and analyze the Chicago version.
In 1879, the National Panorama Company, led by Charles Louis Willoughby and supported by Marshall Field, Judge Treat, Jefferson Printing Company and an assortment of other capitalists commissioned the artist Paul Dominique Philippoteaux to begin works on a cyclorama of the Battle of Gettysburg.  Preparation began in 1880 and by 1883 the National Panorama Company had taken possession of the monumental cyclorama painting which became known as the Gettysburg Cyclorama, Chicago version (so-named for the city in which it was first exhibited).
The work opened to the public in Chicago on October 22, 1883, to critical acclaim. General John Gibbon, one of the commanders of the Union forces who repelled Pickett's Charge, was among the veterans of the battle who gave it favorable reviews. So realistic was the painting that many veterans of the war were reported to have wept upon seeing it.
Wake Forest University/ Joe King Version (hereinafter WFU version)
It was originally believed that Joe King, a Winston-Salem artist tracked down this Chicago version and later donated it to Wake Forest University, where it was then  sold to three NC investors before it was donated in 6/2019 to the Civil War and Reconstruction History Center.
However, The authors of Gettysburg Cyclorama, The Turning Point of the Civil War on Canvas, Boardman and Brenneman  present extensive historical research that concludes that the WFU version is not one of the original four done directly under Philippoteaux's direction, but is rather one done under the direction of Austen, using Philippoteaux's drawings, and with many artists from Philippoteaux's studio.  Furthermore, they cite newspaper articles showing that what they believe to be the Chicago version was destroyed in a storm in Omaha in 1894, and they also present evidence that Austen directed the production of the WFU cyclorama in 1905. This WFU version was recently featured on WRAL's Tarheel Traveler program.
Panorama Battle of Gettysburg Chicago Union Pickett's Charge cyclorama John Gibbon Cyclorama