The old Corn Belt Bank Building is an excellent example of Romanesque Revival skyscraper architecture, designed by George Miller in 1901. Louis Sullivan was already active, but by no means was his style universally accepted.
Conservative architecture, such as shown here, was still very popular.
Thought the influence of Sullivan is still subtly there; looks below, where a giant bay windows sits below a pilaster up above. It’s not being crushed because the steel skeleton supporting the building. like at the Wainwright Building in St. Louis.