In 2010, Kreilick Conservation, LLC was retained to perform the exterior bronze conservation for the Theodore Roosevelt Memorial Wing of the American Museum of Natural History (Phase I). This portion of the Museum was designed by John Russell Pope (ca. 1929), completed by 1934, and listed in the National Register of Historic Places in 1976. The scope of work included the removal, treatment, and re-installation of seventeen (17) exterior window grilles, the in-situ conservation of the main entrance window grille and sculptural frieze, main entrance pocket doors, north and south bronze flagpole bases, and the re-gilding of the flagpole finials.

All exterior window grilles, except the main entrance grille, were removed and treated off-site.  All other elements were treated in-situ.  Each grille was numbered and documented.  Previous bird proofing was removed, leaving holes in the bronze which were tapped and filled with salvaged historic screws. All bronze elements underwent micro-abrasive blast cleaning with crushed walnut shells to remove loose and unstable corrosion products.  The grilles were then washed, patinated, lacquered, waxed and buffed to achieve the final appearance. In addition to this treatment, a new door pull was created and cover plates were installed for the interior pocket doors.