I am writing the first book from the American point of view about 19th century rotunda panoramas. These were the biggest paintings in the world, 50 x 400=20,000 square feet, housed in their own rotundas which were 16-sided polygons. Chicago in 1893 had 6 panorama companies and 6 panorama rotundas.Johannes Schultz worked for William Wehner's panorama company, whose studio was located in downtown Milwaukee. Wehner produced two units of BATTLE OF ATLANTA, two units of BATTLE OF MISSIONARY RIDGE & LOOKOUT MOUNTAIN, and four units of JERUSALEM ON THE DAY OF THE CRUCIFIXION. I have much info to share.