RACINE, Wis. (AP) — Frank Lloyd Wright fans will get their first look at one of his most unusual buildings, an industrial tower with a tree-like design, when a home products company opens its former research and development center to the public this spring.

The 15-story tower at SC Johnson’s headquarters in southeastern Wisconsin is regarded as one of the country’s most important examples of cantilevered architecture. The first floor looks like a tree trunk, with second and higher floors springing off the core like branches.