Marshall Building

Marshall Building - Credit: Wikimedia Commons

The Marshall Building, formerly known as the Hoffman & Sons Co. Building, is a historic building in Milwaukee, Wisconsin, United States. Part of the Historic Third Ward, the six-story building is the oldest existing example of structural engineer Claude A. P. Turner's Spiral Mushroom System of flat-slab concrete reinforcement. Read more on Wikipedia

type: building
date from: 1906

Source: en.wikipedia.org