the top of the building when the concrete had cured. Completed in eight months, the finished building measures 50 by 100 feet (15 by 30 m) at its base and 210 feet (64 m) tall. The exterior concrete walls are eight inches thick (200 mm) in unbroken slabs 16 feet (5 m) square with a veneer 4 to 6 inches (100 to 150 mm) thick. The Beaux Arts Classical exterior is covered on the first three stories with white marble, on the next eleven stories with glazed gray brick, and on the top floor and cornice with glazed white terra cotta. Landmark status Still in use today, the building was designated a National Historic Civil Engineering Landmark in 1974 by the American Society of Civil Engineers. In 1975, it was added to the National Register of Historic Places. Proposed Condominium Conversion The building was purchased on January 17, 2013 by CLA OH LLC (an affiliate of Claremont Group, a New York City-based real estate development firm) from CapCar Realty 1.1 LLC, for $1.45 million. In November 2013, Claremont Group CEO Perry Chopra disclosed his intentions to convert the office building into 40 to 50 condos, with ground-floor retail. However, in April 2015, a real estate broker announced that the building was again for sale, after Claremont Group decided not to execute the condominium project. It was converted to a hotel, the Courtyard by Marriott Cincinnati Downtown, in 2021. See also List of historic civil engineering landmarks References External links Concrete Tower Scrapes Skies (February, 1999). Engineering News-Record Ingalls Building. Emporis.com Ingalls Building. American Society of Civil Engineers Skyscraper office buildings in Cincinnati Concrete pioneers National Register of Historic Places in Cincinnati Historic Civil Engineering Landmarks 1903 establishments in Ohio Buildings and structures completed in 1903