How did the National Farmers’ Bank in Owatonna combine simple forms with elaborate decoration?

The National Farmers’ Bank in Owatonna, Minnesota, achieves a balance between simple form and elaborate decoration through a deliberate architectural composition.1

The structure is defined by a simple, austere cube form that conveys a sense of security through its walls of red sandstone and brick. This basic mass is punctuated on two sides by large, arched windows that provide visual clarity to the building's exterior.1

To contrast this simplicity, the building is embellished with intricate, decorative elements. These include bands of colored mosaic and blue-green glazed terra-cotta that adorn the walls, adding texture and visual interest to the otherwise plain surfaces. The interior of the bank was designed to harmonize with this exterior aesthetic, featuring semicircular murals that align with the placement of the arched windows. While the design is attributed to Louis Sullivan, it is noted that the project was primarily the work of his assistant, George Grant Elmslie.1