Henry B. Clarke House
Clarke House may have been modeled on the home of William B. Ogden. The Clarke house is often described as the oldest surviving house in Chicago, although part of the Noble-Seymour-Crippen House in the Norwood Park neighborhood was built in 1833. (However, Norwood Park was not annexed to Chicago until 1893.) The Clarke House was designated a Chicago Landmark on October 14, 1970. It was added to the National Register of Historic Places on May 6, 1971.
Hallock–McMillan Building
The Hallock–McMillan Building, also known as the Hallock and McMillan Building, is the first and oldest commercial brick building in downtown Portland, Oregon, in the United States. The building was designed by Absalom Hallock and completed in 1857. It is adjacent to the Fechheimer & White Building. In 1975, it was listed as a "primary landmark" in the National Register of Historic Places (NRHP) nomination of the Portland Skidmore/Old Town Historic District, the building's designation subsequently "translated" to "contributing property" under post-1970s NRHP terminology.