SC Johnson Research Tower

SC Johnson Research Tower The Research Tower was Frank Lloyd Wright’s vision of a vertical complement to the Administration Building. Opened in 1950, the Research Tower is one of the tallest structures ever built on the cantilever principle. It stands 153 feet tall and its central core, which is 13 feet in diameter, extends 54 feet into the ground. All 15 floors of the Research Tower are supported by the “taproot” core, much like a tree supports its branches. In 2013, the Research Tower went through an extensive 12-month restoration, which involved both exterior and interior updates. The Research Tower was opened to the public for the first time in spring 2014.