Philadelphia-based architect Samuel Sloan created this building, also known as Nutt's Folly?
Samuel Sloan (architect) Samuel Sloan (March 7, 1815 – July 19, 1884) was a Philadelphia-based architect and best-selling author of architecture books in the mid-19th century. He specialized in Italianate villas and country houses, churches, and institutional buildings. His most famous building—the octagonal mansion "Longwood" in Natchez, Mississippi—is unfinished; construction was abandoned during the American Civil War.
Shell Building (San Francisco) The Shell Building is an office tower in the Financial District of San Francisco, California. The 28-story, 115.22 m , building is located at 100 Bush Street, at Battery Street. It was designed by George W. Kelham and built in 1929, in the architectural style of Gothic Moderne, Moderne and Art Deco.