The Citizens Bank Tower is an architecturally significant building in Oklahoma City with its hexagonal plan, slender profile, unusual sunscreens and rigorously sculpted crown. It was among the first tall office buildings to be erected outside of downtown Oklahoma City, setting the standard for other distinctive large freestanding suburban skyscrapers. The Citizens Bank Tower was designed by Robert Roloff of Bozalis, who considered it a tribute to Frank Lloyd Wright and his Price Tower constructed in Bartlesville, Oklahoma. The interior of the tower has been adapted to apartment units for contemporary use.[4] Citizens Bank Tower has been listed on the National Register of Historic Places since March 8, 2010.[2] The listing was announced as the featured listing in the National Park Service's weekly list of March 19, 2010.[5]