Brass plaque commemorating the Ingalls Building in Cincinatti, Ohio. Built in 1903, it was the first high-rise concrete frame building in the United States. Photograph by Charles Clark.

Brass plaque commemorating the Ingalls Building in Cincinatti, Ohio. Built in 1903, it was the first high-rise concrete frame building in the United States. Photograph by Charles Clark.

Brass plaque commemorating the Ingalls Building in Cincinatti, Ohio. Built in 1903, it was the first high-rise concrete frame building in the United States. Photograph by Charles Clark.