Note: Historian Demion Clinco's History Moments do not represent the views or opinions of Arizona Public Media or Arizona Illustrated.

Although historic preservation efforts focus on the many historic buildings and landmarks in Tucson, the city's sidewalks, culverts, underpasses, and street lights--the industrial infrastructure underpinning the city--are also an important part of its legacy.

"The origins and early history of the Iron Works is a little vague, but it was known to be established in 1886 near the site of Hotel Congress and called 'Gardner, Worthen & Gross," says Demion Clinco, president of the Tucson Historic Preservation Foundation.

Under new management the company began designing the iconic 5-globe street light that can be found along Congress St. in downtown Tucson. They have survived and over time become as historic as the many buildings they illuminate.