The exterior ornate bronze work for the Capitol building was contracted by the Henry-Bonnard Bronze Company of New York, under the supervision of bronze master Eugene F. Aucaigne. Architect Joseph Huston was introduced to Aucaigne through George Grey Barnard, who had contact with the company because they had produced his famous sculpture, The Hewer. After Huston had drawn the original sketches and studies, Henry-Bonnard, with Aucaigne at the helm, created the large bronze doors at the Capitol's west entrances, along with the monumental light standards topped with an eagle at the main entrance.

They also cast the majority of the large-scale ornate bronze work in the building. All the light standards on the first floor of the Capitol, the second floor rotunda balcony, the Senate and Supreme Court Chambers, and the Governor's Reception Room were produced by Bonnard. The House Chamber originally had standards also produced by the Henry-Bonnard firm, but these were removed as they took up too much space on the floor, hampering legislative activities. The second floor rotunda balcony grills at the post office areas, and the grills over the House and Senate entrance doors, along with the balustrade railings emblazoned with eagles on the fourth floor balcony, were also created by the Henry-Bonnard Company.