1104 South Wabash Avenue, built in 1891, is on the City of Chicago Landmarks (1996) and is listed on the National Register of Historic Places (1980). Built by William LeBaron Jenney, acknowledged as the inventor of the skyscraper for his fire-proofed metal skeleton-frame designs, the Ludington Building, as it was historically known, represents his continuing experimentation as the first entirely terra cotta-clad skyscraper. The structure is also a rare survivor, being one of only two extant loft buildings in Chicago built by Jenney.