John Buck Building, Chicago

John Buck Building stands as a remarkable example of architectural innovation and design. Completed in 2005, this 51-story skyscraper redefined the Chicago skyline with its striking blue glass façade. The building replaced the historic US Gypsum (USG) building, which had been a prominent feature at the corner of Wacker and Monroe. The design of 111 South Wacker is characterized by its unique orientation; the building is turned at a 45-degree angle, creating a distinctive and dynamic presence.

One of the most notable features of the building is its dramatic lobby, which extends the architectural motif of spirals and light throughout the space. The lobby's floor, made of marble and granite, showcases a radial pattern that mirrors the building’s exterior design. The focal point of the lobby is a spiraling ramp that leads into the 44-foot high space, reflecting an innovative use of design to create a sense of movement and continuity. The spiral motif extends beyond the interior, with patterns continuing onto the pavement outside, seamlessly blending the building’s design with its surroundings.

The building's lighting design has garnered significant acclaim, earning the International Association of Lighting Designers' 2006 Award for Excellence. This recognition is due to the building's luminous ceiling, which provides a cool, diffuse light that enhances the white core walls of the lobby. The lighting design ensures that 111 South Wacker is visually captivating both day and night, while also being environmentally conscious. The non-reflective glass used in the building’s façade minimizes energy consumption and maintains a clear, unobtrusive barrier between the interior and the external environment.