The Athenaeum of Philadelphia is a private library founded in 1814. Its current building was erected from 1845-47 from the designs of architect John Notman. It is one of Philadelphia’s first buildings to be constructed of brownstone, and one of the first buildings in America to showcase the Italianate Revival style. The building was designated a National Historic Landmark in 1976 for its architectural and historical significance.

In 2021, Kreilick Conservation was contracted to plan and oversee an exterior restoration of the masonry and metalwork. This included replacement of the lower course of stone, restoration of the east balcony and west lanterns, and cleaning and repair of the brownstone and stucco façades. Once begun, the project scope expanded to also include the rehabilitation of the wooden cornice and windows. Cleaning of all brownstone, painting, and metal repairs were executed by Kreilick Conservation LLC. Masonry repairs were performed by Premier Building Restoration. Wood repairs were performed by 18th Century Restorations. Keast and Hood were the engineers of record. All exterior changes were subject to the approval of the Philadelphia Historical Commission.