architectural innovation

Architectural historian Tim Hartneck, who volunteers for the Peoria Historical Society and maintains the Central Illinois Landmarks Foundation's architectural archive, said the Caterpillar era is what put modern day Peoria on the map.

The buildings going up now belong to a style that has spread across mid-sized cities in the country — efficient, functional and from nowhere in particular.

Illinois continues to lead the nation in environmentally sustainable building by making strides in sustainable design and construction. The 2016 national…